Hello,
Some days ago I was looking for video files on Commons. I then noticed
Commons not only lacked a proper image search, but does not have
anything to search specifically for video and audio. So I created one:
http://tools.wikimedia.org/~bryan/ogg/
It allows searching in video and audio files, by length, y category,
by resolution and by audio format. It embeds Wikimedia's ogg player,
so you can directly view the videos in your web browser.
Regards,
Bryan