Try making another montage that could be ALOT better. This may have been good to you, but this definately isn't good enough to be considered a montage and be posted. Just learn from your mistakes and improve.
You camped almost the entire time, at one point you waited on the roof by B for about 30 seconds waiting for the 'B' symbol to start flashing so you could jump down there. Several of your throwing knives missed, and 85% of your kills were from your killstreak rewards.
If you are going to make a montage, make it the absolute best! If that is your best, then you need more practice.
PS: Also, really bad music choice for the montage. Choose something you like that most other people can at least somewhat enjoy while not having to hit the mute button. Of course not everyone is going to like the same song, but choose something better and that isn't used in every-other montage video.