The older lady who fell - was the mother of the dude in pink, and the big gal in white.
Guy in white is married to big gal in white.
Gal in tan is married (at least a sig other) of the guy in pink.

Guy in pink is a legit Crip - a ganster. He obviously has a low IQ - and has anger problems.
Big gal in white is his sister - something before the video set them off and he got in her face.
She spit on him (again - probably for the 100th time in their lives) and he loses it.
Guy in white is trying to defend his wife against her brother.

Gal in tan comes over to break-it-up.
Guy in white is mad pink guy hit his wife, so he smacks tan gal (pinks sig other) just to retributive.

Almost settles down - two sisters in law try to muscle each other and mom gets knocked to the ground.
Tan gal realized that it's her fault and rushes to get grandma up - to make it seem less than it was. She does this out of fear of her pink shirted SO.

Pink guy thinks his big ole sister hit mom - goes after her. Slaps her silly. She's a tough gal so far (low center of gravity) but she goes down like a sack of potatoes.

Pink guy finds out that his woman knocked his mom down - he's know he's already going to jail (been before I bet) so he wails on his SO.

Hero status is the unknown dude behind the grassy knoll who choked out pink dude.
Props to the Grey t-shirt guy with hat trying to calm the pink dude down.

Shame on Disney security - there will be a series of inquiries, and the boss will lose his job.
Disney groundskeeper will be found faultless and gets a free pass for his family in late August.