Oh shit, my bad. I'm almost certain it's because we are on lemmy.ml, this server has been having issues. Sometimes my comments don't show up for hours.
Your other comment still appears for me now, undeleted with 3 upvotes. But if I go to feddit.de I can see it's been deleted.
I should have just let you handle it, woops.
I wonder if you can see my other comment on this thread where I uploaded the video itself? Maybe that hasn't loaded for everyone yet, although it was posted over an hour ago