somehow i'm no longer getting prosafia videos in my recommended (don't ask me how i did that), but there are other youtubers like packattack and ytsunny who posted rather spoilery stuff in their thumbnail. it wasn't exactly spoilers, but i unsubscribed from them so that i don't take the risk if they upload a video with a prosafia thumbnail. i mean yt uploaded one of those "all bosses" videos for origami king. thankfully i didn't see the entire thumbnail, but once i saw that video in my recommended i quickly unsubscribed. i also put "not interested" on every origami king related video i'm finding on youtube, just to be safer. so far i'm good, so maybe you guys should try to do these kinds of things if you're avoiding spoilers like me.