I didn't see him whacking any of the snakes in the face. Let's not jump down anyone's throats. The only thing in that video that I saw which was inappropriate was the "work out session" at the beginning. For a "fun" video, no problem; who cares? But if you're going to go professional, then don't include things like that.

Also, and this is my main point ...

You're better off feeding them in their own enclosures! By taking them out of the enclosures to feed, you're taking them out of their element and making them nervous. They're not going to want to eat then. There's no reason to feed them outside their enclosure. It doesn't make them more bitey. Also, you NEED to get some more stuff in those tubs. They are far too big for snakes that size, so you need to make up for it by putting things in there for them to hide under. If you've really done your research, then you'll know that the number one reason a ball python refuses to eat is that it isn't comfortable in it's enclosure. You need to do something about that ASAP.

Please look over the caresheets here and just double-check everything that you've got going. Don't be afraid to ask questions. If people see you're making an effort to set things right, they will be more than happy to help. Please don't let this be a battle of wits or pride. Just be open-minded to what others have to say. Granted, there will be some very negative comments. Please look beyond that and see if there is any useful information in what they have to say.