This is a lame video of my MacMini running MorphOs/Wayfarer and more... :)
Yes it is only 360p and I use mobile version of youtube (also used in OWB for long time and before Wayfarer because it is faster), but for old G4/1.42GHz this is pretty good with stable sound and framerate.
Wayfarer is now more faster and stable then OWB, which was faster with Youtube few years ago.

https://m.youtube.com/watch?v=RQW74hs7UGA&pp=ygURbW9ycGhvcy93YXlmcmFyZXI%3D