If you watch using chrome you can cast the tab to Chromecast and it will optimize and cast the video itself. It works well. The stream itself is laggy at times though and the commentators for unimas are the worst ones I've ever heard.
I know some people like them but I find them both to be very annoying with their overpronunciation of names, strange commentary and exaggerated goal announcing with golazo and goooooaaaaaaallllllll... Sometimes I just mute them for my sanity. /EndRant
That jabroni announcer once after a goal screamed “that’s not a goal” (causing fans to say wha????), pausing and then yelling “that’s a golazooooo!” Facepalm.