Recently I have made a Custom local Flask website to cast from a local device to a RPi4 Connected to my TV. There is a GUI and it is also controllable by GET requests, the main way that the casting works, is in fact passing data from js to python via GET Requests.
It is easy to control but still getting to the main question here:
Is it possible to have a cast button on youtube for my solution? To trick youtube into thinking it is a chromecast or any other way? After pressing the cast button on youtube it would in some way go to my solutions address and pass along the Video URL as a GET Request.
Anyone knows is this possible?