First, your game looks like you have reasonable control even though you are a first gamer.
The 4 minutes and 5-second shots were great, and I think it would have been better if you used an auto gun instead of the sniper in the 6th minute. Seven minutes and 15 seconds to kill the enemy if you don't reload. Bad Luck.
Even though I watched the match for 15 minutes, I felt that the way you played the first time, even if I played 20/30 times, I would not have played as well.