Good point...

The camera is moving around far too much for the double-filming thing to work. I suppose it could be that a purple-haze was added in a movie editor, though that would be much more difficult. The more I think about it, the harder this is to debunk. However, those suspect things make it hard to "suspend disbelief," especially the fact that the movie ends abruptly immediately after the action stops.

It's sad that we have to put so much effort into figuring out if it's real or not. There are just so many fake videos going around these days. It would certainly be an awesome video if it were real.