Program ATtiny85 directly via USB

The ATtiny 85 is a great little micro controller: Cheap, compact, but it does not offer USB programming like our trusty Arduino boards.
In this video I will show how to have best of both worlds, a USB programmable ATtiny85!
In this video we will do the following:
1. Build an ISP programmer with an Arduino
2. Add the ATtiny to the Arduino IDE
3. Burn a USB-ready bootloader in the ATtiny85
4. Upload a simple sketch to the ATtiny to see how it works!
Link for Arduino boards-manager:
raw.githubuser...
Many thanks for Daniel Porry for making this possible.
Have fun!