There is surely room for improvement. As coduxs said, burst 1-3 shots with the AK.
AK has a lot of recoil and is actually pretty hard to use. I suggest you start with the AUZ, although you don't have to. If you know how to master the AK you can pretty much handle every other gun.
Use sound to find out where your enemies are, aim for the head to kill them the fastest way possible.
Also, did you record this with the F9 function? It seemed very laggy, did it also lag while playing? If so, I suggest you try Fraps / Dxtory to record WolfTeam video's. When using the correct settings you should not have any lag while recording.
Other than that; good to see someone else making video's. Maybe one day you'll be making a montage. =)