Lol, don't get me wrong. The overall modelling and setup of this project looks pretty darn good.

It's just that.... let's take your first video you posted for instance. At the end where the guy goes to knock on the glass, his whole arm moves as one up to the glass. Then only his wrist turns to knock on the glass.

If you're going to animate something, I'd recommend doing it yourself in real life first. Watch every part of your body that has to do with what you're animating.

Hopefully that might have helped.