Actually I did have quite a lot of video clips from when I was a LE arrest control/defensive tactics instructor.
Most were left on the PD computer when I left.

It is a training problem, for everyone.
Not committing 100%.
Of course you don’t want to hurt the person you train with (most days) and they don’t want you to fail. so you both
go easy on each other.

That translates to a fail on the street.
One officer I know of, tried a disarm and took two to the vest at point blank range.
The bad guy didn’t just let go like all of the previous training partners and stepped back hard and pulled on the gun while pulling the trigger.