I use iMovie and iDVD on my Mac for basic video editing. On Linux, however, there are lots of software to choose from. Robin Miller gives us a run-down as to the state of video editing in Linux and it looks like it still has a long way to go before it can compete against applications on other platforms. He states:
There have been several notable improvements recently that have moved FOSS video editing tools a little closer to practicality, but FOSS desktop video editing still has a long way to go before it can be taken seriously by people who need to turn out high-quality video productions on tight deadlines.
Funny but large production houses already use Linux to render their CGIs. I wonder when the editing tools will catch-up.