Well the previous video was really crappy so i did a little editing.
To work this software, download a halo flycam (or biterbanana is the author) from this link
http://hce.halomaps.org/index.cfm?fid=997
after downloading, open the software and press numpad 1 or 2 to turn on or off the flycam. w,a,s,d moves the camera around.
Also, Bungie had not planned on putting an actual face under the helmet so they just replaced it with another prototype underneath