As an aside, I embedded a regular YT video and it refused to appear for a while then finally loads. Could be the same thing was happening to you (or it could be shorts can't be embedded, not sure).
I will try again, but yeah, most likely the forum engine doesn't understand "shorts", but I definitely don't understand why the video from vimeo doesn't play, it's a completely normal link, like any other video.
I hate vertical video and YT shorts in particular, but i watched your time-lapse at least 20 times - the amount of little details you put there is just mesmerizing!!
Thank you
romullus, very pleased to hear. In fact, I rendered this throughout the working week, filling every following frame with all sorts of small details.