Not sure what you were trying to say, but the way this works is the person presenting the evidence, in this case YOU, has the burden of proving the video's authenticity.
In any case it didn't take to long to track this down.
It's a CG recreation for a History Channel show.
See your "original video" at 5:12 into this video:
http://www.youtube.com/watch?v=t1azkhXLYkk
Where in the video did it say it was a reconstruction, all documentaries state this if the video is in question....