OK... I must have stepped up to get a soda or something during that part.
We weren't there so we can't know exactly what it was. But it looked like fellow on left throws a flying front kick, lands, and slips. Fellow on right capitalizes by pouncing and throwing an ippon. It doesn't look like an intentional takedown. But I could be wrong... In the current rules, that would be an ippon, and awarded a full point. I think the most important point I'm trying to make is this was a few guys getting together way back, and figuring out what the rules would be. Somebody got a camera and filmed the boys going at it.
Marty Dow worked out in Shinjo Seiyu's dojo. Shinjo Kiyohide is his son, and was 9-time all-Okinawa champion. In the Kadena dojo when papa Shinjo arranged a sparring match (Marty san, you will spar Kiyohide today!) they had two rules. You can't punch to the head, and you can't kick to the groin. But that doesn't mean you can't kick to the head and punch to the groin.
Kiyokide san developed his lateral hip flexibility to the point that (like a very few of my students), he could essentially fall asleep in his lateral splits. If that's the rules these boys are following, then it explains why the guys are standing there with their hands down and heads exposed. Most of those fellows couldn't kick above the chest. They'd never get away with that sheet facing Kiyohide.
Takamiyagi Shigeru is allegedly one of those guys fighting. Interesting... I met him and worked out with him for a week on Thompson Island circa 1984. He was a great karateka and had some great ideas about improving the "dynamic range" of our Uechi system. But he was quite a bit more portly than any of those gentlemen. Hence that film must have been in the 1960s.