First off, amazing tutorial! I love the work that you do and your willingness to share with the community. I noticed a mistake and had a question concerning it. At 12:53 you mentioned to keep the radius of the sphere and circle the same to prevent overlapping. When you get to that you misread the radius of the Spheres as 24 instead of 27. This caused some overlapping to still occur. You worked around it by adjusting some settings here and there. Had you read it as 27, would the work arounds still be necessary? Or does the work arounds still help with the overall look regardless of the radii? Thanks for everything you do!
Thanks for pointing that out! So all of those techniques apply regardless, what you'd want to do is actually make the Spheres slightly bigger than the Sweep Circle radius to help prevent that, but I messed up those values! Sorry about that!
The thing I really like about your tutes isn't that you tell us HOW to do stuff but you also explain WHY it needs to happen which is WAAAAYY more helpful because we actually learn. Thank you dude.
Thanks so much! Thats what I aim to do every tutorials so I'm glad to hear youre learning more about the how and why! Its important to have a deeper understanding of the software! Cheers!
Thank you man, your tutes are great. I run a studio and we have been using Maya for about the last 8 years, we absolutely hate it. C4D seems fun to use more intuitive, more creativity driven and more stable BUT the big problem for us is we have zillions of Maya models that we can’t seem to use properly in C4D, if we could we would bin Maya for C4D. So, if you ever want to do a tutorial on how to get Maya files into C4D easily I guarantee you, we will be watching them. In the mean time keep up the fantastic work, and, thanks again.👍👍👍
Easily one of the best tutorials for Cinema 4d I've come across; and not just for what is possible with this technique, but also for your discretion to lead us there gently.
Its a blessing to have found eyedesyn a month before graduating . Thank you Ej, for the amazing tutorials. (just realized you are one person behind this stuff, thats why the edit) but for real the tutorial help plus the design is amazing to share.
Brian, thanks so much for those kind words! What school are you in right now? Hope your finals projects go well and that my videos will help you continue learning once you're out of school! Thanks for watching!
@eyedesyn Randomly stumbled into this useful tutorial after going through your School of Motion masterclass on C4D. So cool to see how far you have come, EJ!
This technique is quite a time saver! I started to dig into it and experimented with a different types of clone shapes (and swipe profiles as well), you can get some interesting blob-ish or jelly like dynamic structures out of it. Also, you can achieve interesting results by tweaking your swipe material settings! Thanks for introducing to such am interesting worklflow.
I'll send you a link when it's done, thanks again, there's zero chance I would have figured that out without resorting to RealFlow which is a nightmare of a rabbit hole to fall down.
This is really helpful! Thanks a million. I'm thinking this can be a great technique for creating chainmail animations or things like that. Create a chain circle and copy it, adjust soft body settings and wooo!
I'm trying to get a toothpaste liquid look. But when it lands, the stream pushes itself around without even touching. There's too much space inside and around it so it looks too solid. How can i make this look more liquid?
I completed the tutorial, great job again, btw. One thing I've encountered that's nagging me is that when I go to apply a material to the sweep and render it out, what I see are a series of horizontal white bands that appear at varying intervals which, for whatever reason, don't display the material. Any thoughts on how to work around this/what could be causing this? Many thanks!
I dont suppose you would know how to make a nice liquid caramel animation in C4D would you? Im trying to create a project, its coming along, but help is always greatful! Ive tried using Realflow but it crashes thru the Physical Render :(
Amazing informative tutorial!! I wanted to ask that what would be the next step if I wanted to move the emitter, kind of like giving a chocolate icing effect?
Thanks a lot great tutorial! There is only one point not working like in your tutorial: The collider tag on the disk, doesn't react at all like you. The spheres from the emitter are more ending up smashed like tomatoes, instead of doing this nice necklace motion. I tried many times, and the settings seems to be the same, but I must miss a little detail somewhere. Any ideas what I can do wrong?
Hi EJ, wow thanks for this great tut!! I was playing around with making a rectangular ''tube'' - using cubes in the cloner and a square in the sweep, but when I emit, the cubes don't fall down they just stack on top of each other, your help would be greatly appreciated!
For Cubes, you wouldn't need all the high Friction and Position Damping as you would with the Spheres, so remove all that and the Cubes will be allowed to slide and move more!
hey, i have a problem when i render it, with a material applied. Between every section of the spaghetti is a white stripe... how can i get rid of it? :O
Hi, excellent tutorial, many thanks! I have a question: When I try to use 2 or more flows they just explode, how can I control them? I see in your file 0:35 that you have in null groups, flow, flow.1 and flow.2. Thank you again!
thank you for this great tut. was very helpfull as usual. Just a additional question. I'd like to have the same with a ribbon. Tried but looks awkward and is intersecting a lot. Any Idea, hint how I could get that to work
Hey ej - thanks for all the videos they really are the best- would it be poss to do a few on rendering? I see a lot of tutorials that showed stunning rendering results highly realistic n hi res but most stopped when they finished the technical construction of the scene - l love ur vids cos u really go into the nobs n explain what they do so pls do a few on in depth rendering- thx!!
Thanks for the great lesson! Learning with you is interesting and simple, it's cool. It would be very interesting to learn how to make these strips turn into a common liquid. Perhaps you could show it in the next video?
Love it EJ and thank you for all the awesomeness! Question: if you wanted to make the strings sort of "stick" to the collider object (fx. if the collider object was a moving sphere) and not glide down from this. Could you do this with dynamics as well? To put it shortly: can you make the strings sticky? Thanks!!
Do you have any recommendation on how to tie a knot using simulation like this? such as: show a surgeon threading suture through a tendon, looping it through a hole in a bone, tying it off and pulling it tight? Seems nobody has ever figured out a way to do this using physics in 3D...
Hello Sir, I am new on c4d and very confused about how i should get the final rendering ? (colours). Any tips ? or a video that would help with it ! Anyways, thanks for this very clever tut!!
Hey there! I'd definitely check out some tutorials about lighting in Cinema 4D, especially as a beginner. Learning how to get one result won't help you but understanding the concepts of lighting will be very beneficial!
Thanks for the tutorial! Really helpfull! One question though, how would you go about making lets say 30 different noodles in the same scene. I am actually going for a meat grinder effect
yeah thats not going to work unfortunately. There is a way to do Spline Dynamics with Soft Body as far as i know, but i havent found a way to constraint the spline at the top of the meat grinder. There is a tutorial from greyscale gorilla making guts with only splines and using the approriate margin to push them apart. That would be the best solution i think but there is no way to constraint the splines. The Spline Constraint from the Hair Menu does not work with soft body dynamics.. I am forced to look in Houdini for this kind of render intesive simulation i think..
Hey once again thankyou for a great tutorial. Any idea how I could recreate this with xparticles? I tried cloning the object onto an xparticles emitter but with no luck.
I haven't played with X-Particles too much but I've had a friend try using X-Particles and their results wasn't as good as what you could get using this workflow.
Great tutorial! I've learnt Maya but i'm relatively new to C4D. I guess i understood all the soft body dynamics parts but how do i render that with the exact shading/lighting. DO i need to get plugins?
Hey EJ, just want to say thanks again for the great tutorial. A question I haven't been able to solve is when I am satisfied with the simulation, and have stopped at a certain frame, is there a way I can freeze or isolate the object to then become editable? I am filling a sphere with the noodles to make a brain, then the plan is to cut the "noodle sphere" in half and mirror it to get a more symmetrical look, and eventually bring it into another scene and animate a rotation. What do you think the best way of slicing this thing in half would be? Thanks so much!
Great tutorial! I would like to know if there is a way to be 100% sure that the spaghetti won't overlap with itself. I'm trying to do a sketch and toon rendering and the outlines don't show up where its overlapping. Any advice? Thanks a lot for the tutorial, ypu earned a sub :)
You'll need to make sure you're enabling all the right Line Types in the Sketch and Toon Renderer. Looks like Overlaps and Intersections need to be enabled!
Great tutorial this. do you know how (or anyone else) this could be adapted so the string flow sticks to the outer and inner surface of an object. a skull for example? thanks for reading
![ARGENTINA vs. PERÚ [1-0] | RESUMEN | ELIMINATORIAS SUDAMERICANAS | FECHA 12](http://i.ytimg.com/vi/xtI25ENDDSY/mqdefault.jpg)
First off, amazing tutorial! I love the work that you do and your willingness to share with the community.
I noticed a mistake and had a question concerning it. At 12:53 you mentioned to keep the radius of the sphere and circle the same to prevent overlapping. When you get to that you misread the radius of the Spheres as 24 instead of 27. This caused some overlapping to still occur. You worked around it by adjusting some settings here and there. Had you read it as 27, would the work arounds still be necessary? Or does the work arounds still help with the overall look regardless of the radii? Thanks for everything you do!
Thanks for pointing that out! So all of those techniques apply regardless, what you'd want to do is actually make the Spheres slightly bigger than the Sweep Circle radius to help prevent that, but I messed up those values! Sorry about that!
Awesome! Thanks for the clarification!
Of course! :)
The thing I really like about your tutes isn't that you tell us HOW to do stuff but you also explain WHY it needs to happen which is WAAAAYY more helpful because we actually learn. Thank you dude.
Thanks so much! Thats what I aim to do every tutorials so I'm glad to hear youre learning more about the how and why! Its important to have a deeper understanding of the software! Cheers!
Thank you man, your tutes are great. I run a studio and we have been using Maya for about the last 8 years, we absolutely hate it. C4D seems fun to use more intuitive, more creativity driven and more stable BUT the big problem for us is we have zillions of Maya models that we can’t seem to use properly in C4D, if we could we would bin Maya for C4D. So, if you ever want to do a tutorial on how to get Maya files into C4D easily I guarantee you, we will be watching them.
In the mean time keep up the fantastic work, and, thanks again.👍👍👍
Easily one of the best tutorials for Cinema 4d I've come across; and not just for what is possible with this technique, but also for your discretion to lead us there gently.
Thanks Tim! Really appreciate this comment, great to know you found it useful and hope it leads you to some fun experimenting!
Its a blessing to have found eyedesyn a month before graduating . Thank you Ej, for the amazing tutorials. (just realized you are one person behind this stuff, thats why the edit) but for real the tutorial help plus the design is amazing to share.
Brian, thanks so much for those kind words! What school are you in right now? Hope your finals projects go well and that my videos will help you continue learning once you're out of school! Thanks for watching!
Your channel definitely is a TOP 5 C4D channel
Thanks so much for your kind words and watching!
size increment tip was the moment you had me! Another terrific tut!
Thanks Jeff, glad you enjoyed it!
@eyedesyn Randomly stumbled into this useful tutorial after going through your School of Motion masterclass on C4D. So cool to see how far you have come, EJ!
Was just wondering what the 'made of clones' option would result in. And you gave me the answer! Thanks a ton EJ! :D
Lokesh JB you bet! Thanks for watching!
Hi!I am an aspiring designer and just learning to work in 3D graphics.You help me a lot! thank you very much))
Great to hear this, Viktoriya! Always love seeing new people learning 3D! Thanks for watching!
I am new to Cinema 4D and even just watching this got me all excited. Thank you for a fantastic tutorial.. Learnt a new word today.. viscose..lmao!!!
Ha! Happy to help!
You are the blender guru of Cinema 4d .
This technique is quite a time saver! I started to dig into it and experimented with a different types of clone shapes (and swipe profiles as well), you can get some interesting blob-ish or jelly like dynamic structures out of it. Also, you can achieve interesting results by tweaking your swipe material settings!
Thanks for introducing to such am interesting worklflow.
Totally! This workflow is all about experimenting and discovering interesting looks! Glad you enjoyed this video and thanks for watching!
Thanks so much for sharing this technique. Really appreciate it. It so fun!
Thanks for watching, Mark!
Thanks a lot EJ, brilliant as usual...
Thanks Ahmed! Always great seeing you in the comments!
Really love how the dedicated way yo explore each detail and explain how and why every tool works
Thanks so much. You explain things very well.
Thanks for watching Matthew!
Very Good! i never try this way for softbody
Thank you very much !
Thanks! Glad you enjoyed it!
Thanks so much, fantastic tutorial. Your tuts help so much man.
Glad to hear it! Thanks for watching!
This is great, may well finally be be able to finish the final scene of the music video I'm currently working on.
Hope it helps! Would love to see if it works!
I'll send you a link when it's done, thanks again, there's zero chance I would have figured that out without resorting to RealFlow which is a nightmare of a rabbit hole to fall down.
I opened RealFlow once and decided NOPE! Too confusing!
And thanks, can't wait to see it!
LOOKS VERY FUN! THANKS ALL YOU DONE lol
Hope you enjoy it! Thanks for your kind words and thanks for watching!
Amazing tutorial!
Very inspiring and well explained as usual!
Thank you!
You're very welcome!
This just helped me a lot in executing an idea. Good job and well explained. Thank you!
Nice! I'd love to see what you came up with so be sure to share it with me on Twitter @eyedesyn or Instagram!
very helpful , thank you very much
This is really helpful! Thanks a million. I'm thinking this can be a great technique for creating chainmail animations or things like that. Create a chain circle and copy it, adjust soft body settings and wooo!
That sounds like an awesome application for this, looking forward to see you trying it out! thanks for watching!
I'm trying to get a toothpaste liquid look. But when it lands, the stream pushes itself around without even touching. There's too much space inside and around it so it looks too solid. How can i make this look more liquid?
Id crank up the cloner count!
But my cloner is object, not linear. How can i crank up the numbers? I dont see any numbers :/
Amazing tutorial! thank you and keep making more!
Thanks! And I definitely will!
EJ! Excellent tutorial, per usual. Thanks for sharing what you've learned, it's greatly appreciated!
I completed the tutorial, great job again, btw. One thing I've encountered that's nagging me is that when I go to apply a material to the sweep and render it out, what I see are a series of horizontal white bands that appear at varying intervals which, for whatever reason, don't display the material.
Any thoughts on how to work around this/what could be causing this?
Many thanks!
Thanks Neil!
That's because you'll probably need to change the material projection method to something other than UVW Mapping.
I gave that a try as well yesterday and, for whatever reason, I'm still getting those horizontal bands. I'm not sure where I went wrong :-(
Love your tutorials. The way you describe the options gives me time to understand. Really glad I discovered your channel.
appreciate the kind comment! cheers!
thank you for all of your amazing tutorials! you are a great teacher
it's a very unique and quick approach to something that would have taken a LOT more time to simulate.
Keep up the good work E.J
Patrick Willumsen thanks Patrick! Glad you liked the workflow!
Holy crap - been trying to do this exact thing for ages. Thanks!
Awesome! Hope its easier the next time you give it a go! Thanks for watching!
This was so much fun, had no idea C4D could do this?!
Neither did I! :)
I dont suppose you would know how to make a nice liquid caramel animation in C4D would you? Im trying to create a project, its coming along, but help is always greatful! Ive tried using Realflow but it crashes thru the Physical Render :(
Yeah realflow is probably the best for that but I'll keep thinkin!
eyedesyn thank you! Have a Good one!
Good tutorials. Cant wait to use them for my music videos. thanks a lot
Awesome be sure to share what you make with me, love ot hear!
Your tuts are just getting better and better from one to another!
Btw I would call this effect "brain poop")
Thanks Vlad, really appreciate the kind words! I definitely have brain poop sometimes when I can't come up with any ideas! :)
Not sure how I'll use this but it was fun to watch!
Thanks for the tutorial, Got done a Nestle Maggie Bowl.
Nice! Glad this was helpful!
Amazing tutorial!
Glad it was helpful! Thanks for watching!
Niiiiice! I have tried to make this for some time now, this is a very interesting way of doing it. I will go play with this!!!
this is awesome! thanks for sharing!
You're welcome! Thanks for watching!
Great tutorial! Thank you!
Thanks so much!
Awesome, thanks for sharing!
You bet! Thanks for watching, Wonjun!
so cool... how simplified... awesome tut...
steven khenai thanks Steven! Pumped you liked it!
great tips, thanks for teaching us!
thanks for watching!
thank you !!!XD very useful and great video.
i don't know how to thank you .. you are amazinge !!
this comment is thanks enough! Appreciate your support!!
very nice!
Thanks Vincent! Appreciate you watching!
I like your tutorials. I am watching your stuff on Lynda as well. Thank you
Thanks so much for watching and for checking out my courses on Lynda! Much appreciated!
This is just Awesome !!! thank you !!!!
Thanks for watching Ivan!
Amazing informative tutorial!!
I wanted to ask that what would be the next step if I wanted to move the emitter, kind of like giving a chocolate icing effect?
Same workflow, you'd just animate the emitter! Thanks for watching!
@@eyedesyn thanks!
very welcome!
Hey man, thanks a lot. You've taught me a lot. Very useful stuff
Awesome to hear! Glad my tutorials have helped you somehow! Thanks for watching!
Thanks a lot great tutorial! There is only one point not working like in your tutorial: The collider tag on the disk, doesn't react at all like you. The spheres from the emitter are more ending up smashed like tomatoes, instead of doing this nice necklace motion. I tried many times, and the settings seems to be the same, but I must miss a little detail somewhere. Any ideas what I can do wrong?
Great video brother 🤗
Can you please share the texturing and lighting part too?
Thanks very much for watching!
THANK YOU SO MUCH
thanks for watching!
Hi EJ, wow thanks for this great tut!! I was playing around with making a rectangular ''tube'' - using cubes in the cloner and a square in the sweep, but when I emit, the cubes don't fall down they just stack on top of each other, your help would be greatly appreciated!
For Cubes, you wouldn't need all the high Friction and Position Damping as you would with the Spheres, so remove all that and the Cubes will be allowed to slide and move more!
awesome thanks so much!
Hope that helps!
Great Tutorial Man! Thank you!!!
dim Po Cheers! Thanks for the nice comment!
Very nice work
Misbakh Khan thanks for watching!
Cool! Greetings from India!
Thanks Hemanth! Appreciated you watching!
You are THE BEST!!!! KEEP GOING IT MAN!!
MANY THANKS!
Thanks yo! I'll keep on keepin on if you keep on learning! Let's do this!
wow, i really, really love your tutorials
hey, i have a problem when i render it, with a material applied. Between every section of the spaghetti is a white stripe... how can i get rid of it? :O
what type of material is applied? a simple color or? and thanks for watching!
Hi, excellent tutorial, many thanks!
I have a question: When I try to use 2 or more flows they just explode, how can I control them? I see in your file 0:35 that you have in null groups, flow, flow.1 and flow.2.
Thank you again!
wanted to ask how you do render the scene with lightning and the color background? maybe you can do a tutorial on this
im planning on doing some lighting tuts in the future!
Great tut!) And how i can make this dynamic spahetti collide hair?
Perfect tutorial! Thanks! Do you have some tips how to get it like more the quality of a sauce instead of a paste? Thanks a lot!!
Wow! Another hidden gem found! Thanks Indiana Jones!
Whoopish! *whip crack* Glad you enjoyed!
rroobboo 999 Maybe a Taco Bell commercial?
thank you for this great tut. was very helpfull as usual. Just a additional question. I'd like to have the same with a ribbon. Tried but looks awkward and is intersecting a lot. Any Idea, hint how I could get that to work
Thanks heaps for such a great tutorial!
Im stuck at using textures and materials though... how can I proceed?
Thanks!
Learn how to make textures and materials! This is a very simple lighting setup w/ diffuse texture, so def check out some good lighting tutorials!
Hey ej - thanks for all the videos they really are the best- would it be poss to do a few on rendering? I see a lot of tutorials that showed stunning rendering results highly realistic n hi res but most stopped when they finished the technical construction of the scene - l love ur vids cos u really go into the nobs n explain what they do so pls do a few on in depth rendering- thx!!
You're welcome! Thanks for watching! My latest 2 tutorials cover a bit about lighting and rendering, so definitely check those out!
AMAAAAZING!!! Thank you so much!!
Jose krlos Thanks!!! Appreciate the view!
wow!!! i love your video thank you so much
Thanks for the great lesson! Learning with you is interesting and simple, it's cool. It would be very interesting to learn how to make these strips turn into a common liquid. Perhaps you could show it in the next video?
Thank you for this video, I can create a lot of funny stuff! Again, thank you for share it with all of us!
Thanks very much for watching and your kind comment!
Love it EJ and thank you for all the awesomeness!
Question: if you wanted to make the strings sort of "stick" to the collider object (fx. if the collider object was a moving sphere) and not glide down from this. Could you do this with dynamics as well?
To put it shortly: can you make the strings sticky?
Thanks!!
Thor Guldager For sure! You'd really need to crank up the Friction settings on the dynamics tag as well as maybe adding more Linear Damping as well
Thanks a lot! Do i need to mess with friction and damping on both tags or just the soft body tag? Is there any difference?
Id mess with the friction on EVERYTHING! :) So floor, colliders, etc..
Do you have any recommendation on how to tie a knot using simulation like this? such as: show a surgeon threading suture through a tendon, looping it through a hole in a bone, tying it off and pulling it tight? Seems nobody has ever figured out a way to do this using physics in 3D...
Sounds painful! :) I'll look into it!
Thanks before watching :)
waiting for it
Hope you enjoyed it! Let me know!
Hello Sir, I am new on c4d and very confused about how i should get the final rendering ? (colours). Any tips ? or a video that would help with it ! Anyways, thanks for this very clever tut!!
Hey there! I'd definitely check out some tutorials about lighting in Cinema 4D, especially as a beginner. Learning how to get one result won't help you but understanding the concepts of lighting will be very beneficial!
one of the best
thanks, it's realy cool lesons!
What would we do without you!
Nitin Burli You're too kind!
Id love to do this with my spline Logo :) nice tutorial
Give it a go! Would love to see what you make using these techniques!
Thanks for the tutorial! Really helpfull! One question though, how would you go about making lets say 30 different noodles in the same scene. I am actually going for a meat grinder effect
That may be quite render intensive for this method, but worth a try to see what happens!
yeah thats not going to work unfortunately. There is a way to do Spline Dynamics with Soft Body as far as i know, but i havent found a way to constraint the spline at the top of the meat grinder. There is a tutorial from greyscale gorilla making guts with only splines and using the approriate margin to push them apart. That would be the best solution i think but there is no way to constraint the splines. The Spline Constraint from the Hair Menu does not work with soft body dynamics.. I am forced to look in Houdini for this kind of render intesive simulation i think..
Thanks!!! :D
Very welcome, Micaela!
Would benefit from a link to prerequisite tutorials in the description thanks :)
Whoops! Added! :)
Hey once again thankyou for a great tutorial. Any idea how I could recreate this with xparticles? I tried cloning the object onto an xparticles emitter but with no luck.
I haven't played with X-Particles too much but I've had a friend try using X-Particles and their results wasn't as good as what you could get using this workflow.
Great tutorial! I've learnt Maya but i'm relatively new to C4D. I guess i understood all the soft body dynamics parts but how do i render that with the exact shading/lighting. DO i need to get plugins?
Thanks! You don't need any plug-ins for this kind of lighting or rendering, just need to learn up on those subjects!
can you please point me in the right direction for learning texturing/lighting in c4d?
Thank you very much!
thank you for tutorial!
Thank you for watching!
Thank you!
Hey EJ, just want to say thanks again for the great tutorial. A question I haven't been able to solve is when I am satisfied with the simulation, and have stopped at a certain frame, is there a way I can freeze or isolate the object to then become editable? I am filling a sphere with the noodles to make a brain, then the plan is to cut the "noodle sphere" in half and mirror it to get a more symmetrical look, and eventually bring it into another scene and animate a rotation. What do you think the best way of slicing this thing in half would be? Thanks so much!
You'll want to cache and bake out all the animation, even saving to Alembic will be helpful!
THANKYOU FOR SHARE
THANK YOU for the watching!
super super amazing !!!!!!
Thanks for watching!
Great tutorial! I would like to know if there is a way to be 100% sure that the spaghetti won't overlap with itself. I'm trying to do a sketch and toon rendering and the outlines don't show up where its overlapping. Any advice? Thanks a lot for the tutorial, ypu earned a sub :)
You'll need to make sure you're enabling all the right Line Types in the Sketch and Toon Renderer. Looks like Overlaps and Intersections need to be enabled!
Can you make tutorial how to cut them to aparts ? Please !
Thanks very much!How can look like the liquid melting?
Yun Mu something like that would probably be a job for Xparticles
Clever idea!
Cheers!
Very nice. i love your canal
Thanks very much! Appreciate you watching!
nice tutorial!! I expect another tutorial^.^
Thanks! :)
Perfect. Master . Thank you
15:35 you destroyed it without that Gap it was so beautiful
Great tutorial this. do you know how (or anyone else) this could be adapted so the string flow sticks to the outer and inner surface of an object. a skull for example? thanks for reading
Crank up the friction on the spheres!
Im not a native english speaker and i understand you all the time
You can do this with anything! Give it a try! :)
I love this video and you~~!! So Thank you~~~
Thanks for watching!!
excellent !!!Can i share your video to some chinese video webside?Because they can't visit youtube in china...