Try and stay away from the "sniper head shots, last guardian standing and multiple kills" high light reels. They are a dime a dozen and everyone doing the same thing. Call it what it is, a highlight reel not a montage. Better yet, just make clips. Don't make a long video just because the music plays for 5 minutes. Do something entertaining that people will laugh at like showing clips of epic fails or unique and epic achievements like getting a 7th column medal or soloing a raid by only using a toothbrush. I hope you take my advise. I'd love to see more YouTube videos that are entertaining not the same thing everyone has done a million times already. Good luck.