I think it would be great for training at home to have an App on Android TV. At least a horizontal Mode so you can use full screen when you mirror cast the app to your TV via Chromecast.
Would you like to rewrite a use case? I can’t imagine the point of such a feature.
I train online with my friends on a regular basis. In winter I often connected the laptop to my projector (because I had trained indoors) so that I could see my friends better when they were training. But to be honest, you just don’t have time to look at the monitor during training. And you may also twist your neck into an unnatural position (depending on where the projection surface is).
And only for the exercise videos, I think the integration of “big screens” is a little “over the top”, especially since you would actually look at them before training.
So I’m asking for a use case
(Sorry, this is an occupational disease. When users want a change in a product, I try to understand why. Even if I am only a user, too - and not the developer)