Dan MacDonald compiled a list of Linux (open source) video creation and editing softwares.
From video capture to editing to DVD authoring and encoding, you can create high quality videos easily with free, open source software :)
=> Cinelerra - Non-linear digital video editor and compositor
=> Kino - FireWire DV video capture
=> Xawdecode - analog (VHS and camcorder) video capture, DVB capture, streaming and TV/DVR functionality
=> MEncoder - video conversion
=> DeVeDe - MEncoder GUI for easy DVD and VCD creation
=> MPlayer - DVD and video playback
=> dvd::rip - for ripping DVD video
=> Firefox with the Flash 9 plugin and >VideoDownloader extension - for capturing video off the Web
=> K3b - for burning DVD or VCD images
Read more at Linux.com...
My personal experience with Linux video editing softwares...
My personal experience is that video editing on Linux is not easy. At least not 1 and ½ year back. I may try out all of these software's again.
Finally we end up using commercial DVD authoring tools under Windows XP for creating Linux training stuff :(