Hey, I shared this on Reddit /r/halo the other day and though you guys might like to see it too!
Created using the Green Screen walls in Halo 4 and filmed in my old University halls, the amount of hours I put into this are ridiculous!
Micro Halo was a blast to create, capturing footage from Halo 4, trying to match positioning and hoping the depth of field would work out - please check it out 
Here is the link:
http://www.youtube.com/watch?v=Ig1LeY9Z1-E
I hope you like it!