By the way... when you look at the post in the forum, you can see the tiny video icon underneath the title...
So, I guess, the software recognizes it as a video post... it just decided that it “doesn’t like to give me a check for it...” 😢
The forum software keeps a temporary "cache" of certain things from time to time. When this happens, the cached stuff can take a few hours to update. I guess that's what happened here.