I do not have an android TV as of yet, but i would like to test if the app called Macrodroid works on a TV. If i look at the play store for TV's it is listed there so it should work?
If anyone can create a macro that just opens chrome to a certain website (like youtube) whenever you boot the TV, that would be great. The app is very easy to use so this shouldn't be a problem to figure out.
I am looking to a buy the Sony KD-49XG8305 to use this on, but any other tv would probably suffice.
This app seemed to be interesting to me so I tried this out for you. I sideloaded Macrodroid (apk from apkmirror) and it worked like a charm :)
Here's video: https://youtu.be/MQKVti1Mdk4
It was necessary to use Mouse Toggle (or just regular mouse) to create macro, because UI of Macrodroid does not support remote. I've tested it on my Mi Box with an AndroidTV 8 (oreo).