"so i'd be scrolling in the comments on a video about some game i like, and then youtube will say i replied to some randoms comment about a serious/dark topic that i replied to a different comment on a different video like hours ago.
it always makes me paranoid that youtube genuinely put that reply there and it's not just a glitch on my end of the screen, so i always get scared someones gonna think i'm schizophrenic or something"

https://www.reddit.com/r/youtube/comments/z08zch/comments_appearing_on_different_videos_than_they/