While a lot of folks are touting SmartTube for avoiding ads, I will install it to finally have a way to change the YouTube playing speed on the TV. Thanks for posting.
Press and hold for 2x playback is one of the more useful features of the YouTube premium experience and the lack of speed adjustment on TV is quite annoying.
SmartTube is even better than that: it lets you select from a huge range of speeds (I frequently like 1.25x and 1.5x personally, but it has even more fine-grained settings like 1.15x, 1.20x, etc.), and it remembers that selection for that channel, so if a particular Youtuber is a slow talker, you can pick a speed that works well and all his videos will show at that same speed.
Press and hold for 2x playback is one of the more useful features of the YouTube premium experience and the lack of speed adjustment on TV is quite annoying.