Set the video to 1/2 speed or 1/4 speed and you can count the shots easily. They don’t sound like gunshots so you might have to listen through once to understand what you’re hearing.
The first round of fire consisted of 11 shots the second round of fire consisted of 23 shots.
Hmmm. They make 35 round mags. Could it had been a 11 round go and then the rest. Maybe he didn’t load 35.
That’s what I counted. Though I don’t know if the recording started before the first string of shots.