Sorry, standard HTML can not be activated for security reasons. It would attackers allow to takeover the forum.
(A small, safe, subset of HTML features is activated but nothing that would allow for a carousel to be created ;-))
lol hi Andreas!
Kind of funny you popped in and knew what I was doing, haha
Yes I could tell that it isn't working and I guess that security point is valid. Either i'm going to try somehow make my own embed (probably unlikley), or just give up and use an image/video/gif-based post for the styling.