I worked a large part of the night, I finally finished to debug the video embedding. I tested it under Ubuntu Jaunty, CidiWiki works perfectly. Let me know if you have any problem or if you want I implement a new feature.
The code is available on sourceforge: http://sourceforge.net/projects/ciwiki/
To summarize the new feature added to DidiWiki are:
Picture width, height and border size
Video embedding: youtube, dailymotion, vimeo, veoh and flash