They are only practicing with what appears to be pretty limited rules. My unexperienced eye seemed to notice some similarity of movement to Akuzawa.
Certainly not full fledged San Shou.....
Agreed . . . something like free style push-hands, primarily stand-up grappling, sweeps and hooks but no kicking, shoulder kao
but no fists or elbows.
I didn't see a lot in CZQ's own movement that reminded me of Akuzawa, but studying it again with a focus on the partner/opponent's movement and responses, I saw a number of moments that reminded me of the effect Akuzawa has, taking sharp and forcible control of the center . . . 7:35 is one example.