Is this a video of Rob Gronkowski dunking in high-school?

While browsing that thing the kids call “Youtube” these days, I found this clip of what appears to be Rob Gronkowski throwing down in a high-school hoops game. The clip is really short and is a little grainy, but the face at 00:12 appears to be Rob Gronkowski with a “I’m Gronk!” face.

If it is Gronk, would that surprise you at all? After all, dude is a phenomenal athlete and his reaction to the dunk is 100% something that Gronk would do.