How to edit Halo 3 video?

[new360walkthroughs]

There is a video in theater mode in Halo 3 that i recorded about 3 months ago. I no longer have the original match on file, just this 53 second clip. I need to erase the first 20 seconds of the video because i didn't mean to record that part. But it wont let me do this. Is there any way to make it shorter or rerecord it?

 

[Jack]

Just get it onto your computer, and cut the first 20 seconds that you don't need. Unfortunately, there is no way to cut the video on the Halo 3 disk itself.