I don't think it's an Ovation. The fretboard ends way before the pickups, unlike how it does in the picture above. And considering Chris has switched the pickups out for 'buckers, it would be hitting the fretboard. And the bridge doesn't look like it's back far enough. The one in the video has the switch in a different position too, but he could have just routed the body out.
What's up with that weird cut-out in between the pickups? Looks like their might have been a third pickup there are some point and he took it out. That might help figure out what it was, unless it was a custom job, which would make this even harder.
How about the finish? It looks like a dark green-ish plaid color. Anyone ever seen anything like that before?