There are 2 different things going on here…

First up, there's been an issue for a while with video embeds showing on the profile but not in the Latest feed. We got round that by posting the Thread first without the embed link, then editing it in afterwards.

In the last few hours all Threads with video embeds have disappeared. The Threads themselves are still there but the video has gone, along with the text in many cases so it's just empty.

Hopefully resolved soon!