Originally Posted by
L0n3N1nja Casting YouTube from my S7 to my TV I can see a visible difference between 720p and 1080p. Maybe that ignores it because it's casting, I don't know.
Casting isn't the same thing at all. Casting tells your Chromecast to grab the video and that is it. After that the Chromecast takes over the streaming part -- your phone is just a controller.
Plus to cast you usually have to be on the same WiFi as the Chromecast so therefore aren't on cellular which would negate cellular data use anyway.