Gosh, I wonder what it would be like to be your cousin… imagine if he didn't know this video was out there, that its up there without his permission, that he's been taken advantage of, that he could be mortified if he knew it was out in the open and there you are, not bothering to tell him and spreading it around even further, compounding the pain. But you'll never know for sure, because you've not told him its up that its up there or found out if the video being public is with his blessing or not.
Although, from the first couple of seconds, it seems to be an old video, possibly from a video chat site like chaturbate, also looks underage.