This OVA was release in the begining of 2011, and it shows the future Naruto Sage vs Sasuke. The battle between them appears to be at the ending of the Shinobi War, where only Naruto and Sasuke stand alone, fighthing.
Characters like Kakashi, Sakura, Kabuto and Madara also appear in this OVA.
All this thing is is a bunch of clips from Naruto taken and cut together along with some original clearly fan made clips. It's not real, don't waste your time.