Well he did bounce the weight off his chest there in that last video posted. Also, if it were powerlifting he didn't pause either so would never have passed, but obviously it's not a competition.
Spotter, you should have helped him up when he stalled on the second rep attempt. You let him bounce it a few times off his chest before you jumped in. Luckily, nothing happened from it, but once the bar stops moving up, there's not much more to be done about it.