That's gotta be the stufftiest video I've ever seen.
It's impossible to tell the legitimacy of an item by its sale price. I have a legitimate Versace t-shirt that retailed for $559, never used, that I got for $15.50. At that same cut rate discount, a $100 pair of Jordans would be $3. Also, the Versace shirt was new, and these Jordans are probably used.
The only reason I think they might not be real is because it's really difficult to sell something you paid $100 dollars or more for, for $2. Check the tags and stuff. I don't know anything about shoes, but I can tell real clothing from fake clothing from pictures.