Some month ago they removed the Speed Up option when watching YT on TV.
This basically costs me hours of my life as I normally watch videos on 1.5 speed...
It seems to reappear and disappear and seems dependent on devices: the Onn Google tv stick seems to have had it disabled permanently but on the Chromecast with Google tv it still works fine. I also watch at 1.5 and would stop watching if I could no longer do that.