I'm obviously not Admin and so I'm guessing but don't know for certain. Most websites tend to optimize their website for certain web browsers. Even if a website is optimized for all web browsers, over a period of time and browser security updates, etc., the website is no longer optimized for all of the websites. Since it takes time and money to keep a website optimized for all web browsers, I "think" the websites just take the time to optimize for a single web browser. Since Google is the largest, I think they get chosen by default. Firefox, MS Edge and other browsers slowly lose the ability for many things to work on a website. If you're using a browser like Brave that uses a lot of Google's stuff, your browser will still likely play videos, etc. Admin will have to chime in to get a certified answer but I think that's likely why Edge, etc. don't play videos.