I hate whatever automation YouTube has for moderating their comment sections.
I'll occasionally post some really long reply, or I should say try to, and have it show up for me but not actually show up when I look at the same video while logged out. This happened earlier today. Someone had replied to one of my comments asking me something, and I answered them. You cannot see this, last time I checked, because YouTube's automod caught it for who even knows what reason.
So, there went like five to ten minutes of typing for nothing. It was about Linux, under a video about Linux, if you're wondering.
Why they apparently don't want any actual discussion to happen on their platform is beyond me.