To me it looks like you just spooked the little guy. He's all balled up so I'm assuming you just took the hide off of him to get those videos? If you did, he may just be trying to hold still. I've seen my girl do this from time to time when I startle her...she freezes and seems to be trying to hold her breath. She takes a deep breath and holds it again. Personally I think it is just when the get spooked they are trying to move as little as possible. Just myI'd still run the little guy to the vet to be sure he doesn't have parasites...the majority, if not all of the balls from the big chain stores are captive hatched, so it's very possible he could have something. (I see now that it says "it's a girl" so maybe you already took her to the vet?)
To help with getting him to eat, now that you have your tank set up, just leave him alone for a week. Just peak in to make sure he is in there and has water, but I would even say don't mess with his hides (picking them up to check on him and what not). Once he starts eating regularly, then you will be able to start messing with him more. I would even wait on the bath....if it has water and the humidity is ok, there isn't any reason to give it a bath until it's eaten a few times for you.