This is a Halo: Reach dualtage from Marshy and Hayzee edited by Omn1science, entitled, "Deliverance". The gameplay is solid, featuring some nice multikills, and the editing is good, showcasing some really well-done transitions. Enjoy!
"Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has." - Margaret Mead