CloudCompare2.5D - LIDARUAV - Calculate the volume of a stockpile Point Cloud

Cloud Compare to calculate the volume of a stockpile. Point cloud was created by scanning the stockpile.The scan took 5 minutes and 30 minutes to process.

[@altanreis1616]

I just started with Cloudcompare (CC) and I have found different ways to measure surface and volume. I would like to ask, which one is more accurate?
1. method is to mesh the point cloud and then go: 'Edit -> Mesh -> Delaunay 2.5D (xy plane)' or 'Edit -> Mesh -> Delaunay 2.5D (best fitting plane)'.
After I meshed the point cloud, again I go to 'Edit -> Mesh -> Measure Surface' or Volume. The results pop up in the console. The units are square units or cube units, perspectively. That means, if your input data has meter as lenght unit then is it square meters/cube meters, right?
2. method is the one in the video. Depending on the grid size, I get different results. But these are way over the top different :'). Would you please give an explanation.
Thank you very much for this video and stay healthy:)

[@DavidLPitman]

Thanks, but needs audio or at least captions as to what you are doing.

[@farhatunmufrodah1227]

does this use the cloud to cloud method?

[@cesarin804]

No entiendo que pasa con la grilla? Aumenta y baja el volumen

[@jieqiongyu5984]

could I please ask if I can get the link of your point cloud data? Thanks!

[@jldrodriguez]

Hi, can you send me an email to [e-mail], thanks