This is a clip from a tournament that is set up to find out specifics of jiu-jitsu application in vehicles.
The rules were: 3 min (or till submission) on driver’s seat and front passenger’s seat, then switch and 3 min more (or till submission). If the score by submission is equal, competitors move to the back seats for 4 min round. If no submissions happen on the back, the competitor with more pts wins. Points are count for the mount (4 pts), back mount (4 pts), and knee on belly (2 pts) positions. And yes, competitors can use the seat belts.
I can dig it.
The First Car Jitsu tournament, at Midwest Defense LLC, Wamego, Kansas, Oct 25, 2020.