I haven’t noticed or didn’t care that the content was in SD on Linux. I was pretty happy it worked. Use a Roku for streaming HD to the tv for the few things I watch there.
There is a weird “wildvine” plugin thing that chrome and Firefox use for video drm for some services. I think that enables video.
Linux seems to be the only OS that is respectful of the user.
But desktop Linux has come really far. It my daily driver on my home machine and I’m switching to it at work (or cluster is Linux anyway). I’m hardly a sys admin type and it’s been working great for me the past few years. Even steam works on Linux now.