The AeroVironment Switchblade is a miniature loitering munition, designed by AeroVironment and used by several branches of the United States military. Small enough to fit in a backpack, the Switchblade launches from a tube, flies to the target area, and crashes into its target while detonating its explosive warhead. The name switchblade comes from the way the spring-loaded wings are folded up inside a tube and flip out once released.
After each wave, 4-5 [North] Koreans arrive on buggies, "line up" chopped carcasses [bodies] in a line, as in the video, and mask the faces of the deceased.