Currently helping out with a Drupal 6 / MediaMosa CK 6.x-1.0 based video platform (currently http://lvoorl.mnds.org/), leerling-voor-leerling.
MediaMosa CK 6.x has been chosen instead of 7.x because it is mentioned 6.x is more stable, which has priority for this platform right now.
All in all, it has been a pleasure implementing MediaMosa. The site is working fine, but we did encounter three problems:
1) The generation of lots of empty media files, as can be seen using the WLE interface here: http://wle.mnds.org/ - could this be the bug mentioned here: http://mediamosa.org/trac/ticket/499 ? Can something be done about this?
2) As WLE admin, one can replace any video file, also if you are not the uploader. Using CK, only the uploader can do this, otherwise (on trying to edit a video asset) you receive a Whitescreen or an "upload ticket creation failed" message. - can this be circumvented?
3) This one is a bit tricky, but every now and then (I estimate 10 to 20 percent of the uploads), the transcoding seems to get stuck on still creation. Might just be a busy server, but it feels like there is more to it. Have you encountered this problem before?
Robin van Emden