Not only has this video been around forever, it's been used for all kinds of random purposes. For example (pretty funny, but might help to be a fan of the music):

http://www.youtube.com/watch?v=KQTAjpo4QJg

It seems to me that NE2D is making very logical points. The fact that someone finds it distasteful to state the manager/corporations point of view is ridiculous to me. It's not a conspiracy, it's just using reason.
As a person that works in retail as a manager (even though I'm hardly a willing consumerist), I completely understand the manager being suspicious.
I agree, this guy is likely not a scam artist by all the noise he's made, but there is no way the manager could have known this at the time. All he sees is a guy walking in with a box of tiles claiming he got them instead of his intended electronic equipment... would sound fishy to me.
Yes, Best Buy as a corporation might be protected with insurance, but I assure you the individual store and managers are held responsible for any shrinkage (which includes return scams), and employee hours/benefits can be cut when a store loses money to such scams (whether this particular case was or was not a scam... insignificant to the matter as a whole).
You can stick up for the consumer, but how about the equally deserving employee who is trying to make it by on as many hours as the store can afford to give.
The manager made the only decision that could be made from his point of view.
What I find hilarious is that people think a retail store manager is high enough up on the totem pole to be in on some giant corporate scam. I care enough to make sure my store does well so I and my fellow employees are well off, but I could care less about pushing forward some mystical evil agenda.
It's not like the customer can't get a full refund; he already stopped payment. If stores made it their policy to accept any return request that came in the door, every scam artist would be putting tiles in a box... I already see that sort of thing far too often.