I thought it would be worth putting this in a specific place, and couldn't find a thread with this info. Somebody or a few somebody's was posting ways to post media links (twitter, YouTube shorts, etc) that show up embedded rather than as text links. Can we get those hacks all included in this thread, as well as any new ones?
To post YouTube videos which are embedded click the film icon next to the picture and smiley face icon and it will prompt you to embed a URL.