i had a look and this is what i found.
www.imaginarycinema.com/cameron.html
if you look at his filmography, it says nothing of jaws
so by the looks of it, no, i don't think this is real. Also, if you look a lot of the shots have different sharks, different boats and i don't think it really fits together. Also, it said summer 2007. what season is it? what year? Also, like you said they spelt legend wrong.