John Gruber laments that Apple missed its chance to require apps on tvOS to use the standard video player:

What Apple should have done right from the start with the tvOS-based Apple TV a decade ago is require all apps to use the system video player. No custom video players. It’s too late for that, alas. […]

Apple should use the App Store approval process for the benefit of users. Isn’t that supposed to be the point?

I don’t accept that it’s too late. They should do the necessary engineering to let video be forced into a system player, similar to how the picture-in-picture player works on iOS.