Fortunately, if you can install uBlock Origin in your browser, all you have to do is add www.youtube.com###items to your filter list and it will kill the entire Youtube sidebar all at once, and can be removed at any time if you’re watching non-Pony videos.
Really, if you are going to watch it eventually, why wait? Spoil yourself because by next week, it will be old news. It is not different than the guys with FOOTBALL YEAH that used to VCR, now DVR their games on Sunday and don’t watch it till a week latter. Meanwhile everyone that ever watched the game are already talking about it and by next week when the new game comes on, it is already yesterdays news.
Either you get in with it or you don’t at all.