We've fixed the video embedding issue, and Vimeo now works too.
Below are two videos, the first shot a year ago, the 2nd one 6 months ago. To embed, just grab the url of the video and paste it right in, no tags or code needed.
http://vimeo.com/853601
http://www.vimeo.com/851172
http://www.vimeo.com/853006