Probably, but the guy was clearly firing a full auto, which have been rather extremely difficult to get in the USA since the 1920s. (You can do it, but it takes tens of thousands of dollars, the weapon must be antique, and there is an extensive approval process.)
From the slow rate of fire and long time between shooting intervals, I am thinking he was using some kind of home-cooked AK-47 clone with a drum magazine.
There is nothing legally to be done about this – there is a video on Youtube where a guy makes an AK using a shovel. Seriously. It takes the barest of mechanical skills.