Interesting footage. However, nothing like what I've witnessed with Largemouths.
Crawfish (not sure what a "crayfish" is) are the number one forage item in my area by volume. They are good food, but, only about 40% of the crawfish is digestable. The hard, chitonous shell is not digestable.
When the bass finds the crawfish (red swamp crawfish, Procamberus clarkii) on the bottom, claws raised in defensive posture, it first grabs the crawfish by one claw and shakes the claw off. The bass may or may not eat the claw. Then it does the same for the other claw. Once both claws are gone, the bass eats the rest in one bite.
I'm fairly certain that bass, carp, and other species become aware that the crawfish has molted, they'll all they can to get at it. I've seen bass and carp both, nose in a hole trying to "pump" a molted crawfish out with their gills.
Especially this time of year, crawfish are a very large part of the local bass' diet.