I'm pretty sure in halo 3 campaign you could only upload a single playthrough to your fileshare, but you couldn't cut a single part from it or edit it much. ODST probably works the same way, you'd have to save the entire mission.
$ilva $hadow wrote:I looked on bungies site, and correct me if I'm wrong, but you gotta pay to be able to record videos and be able to upload them.
Thats for the render to video service Bungie alow for Bungie Pro members. Basically a Halo 3 video is tiny in filesize because the game generates the code and plays the events back to you. A Bungie Pro subscriber can upload a clip to their fileshare and render it into proper .avi video format.