This video really just shows a bunch of "between my legs takedowns" and never really answers it's own question, if it really is a real strategy.
It is a fact that women in general are physically weaker than men (or men physically stronger depending on your viewpoint), but the difference in physical strength is less in the legs than in arms. Combined with the fact that leg muscles are larger and consequently stronger than arm muscles it makes sense to use create a fight choreography favouring legs and momentum rather than brute force for female fights.
That said it would be interesting to see if it really does have something going for it. This video clip doesn't come close to answer that question.
It's a big deal because it essentially turns every Canon camera into an Apertus Axiom. With a custom Linux running you could run anything you want from the camera (provided that the ARM-processor is strong enough for the task). Clean 4K out should be no problem, a better internal codec or a flat log space. All suddenly possible.
Suddenly the limitations to what you can do with the camera isn't what Canon decided to let you do, but what the hardware is capable of doing.
I think it will be very useful for text journalists to use instead of/in addition to their smartphones. When out on jobs, particularly sports and events, it isn't uncommon to record the interview to reference later.
With something like this, the news organization could also get usable video with good sound to use on their website. Granted, the quality will be less than what you get with a real crew, but often enough there will only be one journalist at the scene.