There's essentially an open standard for streaming video so it's not like the old days where you needed to download a platform-specific component to watch streaming video. I use Linux as my primary environment and I can't even remember the last time I had trouble with it; certainly not for several years at least. I've used Netflix, DisneyPlus, Amazon, Paramount+, and probably others.

Just as a heads up, though, if you are using Firefox then the first time you go to any of these sites it will prompt you as to whether you are fine with enable support for DRM video, and you need to click "Yes". This is a one-time thing, though. (It does this because if you are an open source purist then you might not want to do this so it likes to get your permission first; most browsers just assume that you don't care and enable it by default.)