I used to do it as a kid with proper lobster pots. Wait til low tide, find a rocky point, spin around like a hammer thrower while trying not to get tangled in the rope, and chuck it in the sea. Tie off and haul the next day. Was never lucky enough to get a lobster that way, had to wait til I was older and got my own boat. But got plenty of brown crab. I've fished velvets commercially, but must confess that I've never actually tried to eat one.
Got to say, that guy was lucky to just pick a lobster off the seabed!