Rumor has it Samsung has been doing this, but more along the lines of what car manufacturers do when testing cars, camouflage to some degree, but using cases and the like.
Right now anything S3 gets hits. Just like anything iPhone 5. Everyone wants they're fame, and on the internet anyone can be famous.
I'm going to guess that the original was removed because Samsung didn't want it (as a fake) up. Honestly, what dweeb has a sweet job testing uber phones and is stupid enough to go on camera with it. I would bet Sammy has those that are testing under contractual obligations, with some sort of compensation if they break it.
I remember reading that Apple kept ipads locked to a table when they tested.
These guys have one of the two most anticipated devices this year. They are not going to be so careless as to give one to the tool shown in the video.
Even the specs from Amazon I doubt...nothing more than a spot for fans to place orders for something they'll buy regardless. I would like to believe the price asked. Could be, since the HTC One X is going for about 550 Euros...Sammy is doing a great job this time round in keeping tight wraps on the SIII.