(Beware of jank, needs a rewrite!)
Supports Halo: Reach, Halo 3, & Halo 3: ODST (support for Halo 2, Halo 4, and Legacy Xbox 360 Halo titles coming soon!)
Grab .NET Runtime 8.0.8 and .NET Desktop Runtime 8.0.8 from here.
M Starts path
N Stops path
P Rolls camera clockwise
O Rolls camera counter clockwise
I Zooms camera in
U Zooms camera out
K Adds a keyframe