Add Materialious for YouTube

[maboroshin]

YouTube client : Materialious for Windows/Mac/Linux/Android
https://github.com/Materialious/Materialious

[maboroshin]

YouTube client : Grayjay for Windows/Mac/Linux/Android
https://grayjay.app/
https://gitlab.futo.org/videostreaming/grayjay
At this time it is free and fully functional. Not sure if it meets the criteria.