Louis Wu has finished putting up all the Halo cutscenes into their Halo Cutscene Library. If you get all the hi-res QuickTime versions, you’re looking at 37 files totalling 387 MB!
I’m planning at some stage in the medium future to revamp my Halo Screensaver so that it can use playlists of files, so that you can watch all the cutscenes one after another, or maybe a whole season of Red vs. Blue 🙂