Video Editors
These sites offer free online video editors, often with other services. You may have to register. These sites were available in 2010.

 YouTube Remixer
One True Media
 Movie Masher
Stash Space

Note: Eyespot, VideoEgg, Cuts, MediaOne, and Kalura are dead.

5 Site Reviews

Video Libraries
These sites offer free online video

YouTube Video Playlist - DEMO
Flow Video Player - DEMO
Random Webcam -
watch the world!

Video Convertors Online
makes it easy to convert videos from Youtube and also upload FLV files from PC. Very fast conversion.
Movavi notifies via email when converted files are ready to download.
Tubefish  video converter can convert your videos  to MPEG, AVI, MOV, 3GP and Divx.
VideoCodeZone converts videos from Youtube, daily motion, break, metacafe  Online Free FLV to many formats
ZamZar simple convertor that sends files to you via email