Thanks. I was a Qubes user for years, across multiple computers. When things worked well, I found it to be easier than a regular Linux install to administer. Despite plenty of time and effort, there were some issues I was never able to resolve. I often ended up either using two computers or dual/triple booting, which tended to result in spending more time in the side that "just works".
How is your personal experience now? Does youtube in a browser work well for you? How about watching a movie saved locally?
https://forum.qubes-os.org/t/improving-video-playback-speed/...
https://forum.qubes-os.org/t/hd-video-playback-on-qubes-os-o...
https://forum.qubes-os.org/t/improve-video-playback-performa...
and
https://github.com/QubesOS/qubes-issues/issues/8962