Well, he had 5 catches for 77 yards against Stanford a few weeks ago. That was a road game, so Washington would have been wearing their white uniforms for that game, which is probably the one that the highlights were from.
ESPN lists him at 6'6" 258.
I've been through the top 35 high school TE prospect for each of the last two years (in case our mystery TE was a redshirt) and Jenkins is the only guy that fits the bill. He's 11th in the country for TE receiving yards and t-11th for TDs. None of the other 69 guys have come anywhere close to that, and all of the similarly productive TEs are juniors and seniors.
Nick O'Leary, the #1 TE prospect from last year, had a nice game for FSU tonight, 3 catches for 87 yards. But that more than doubled his production from the rest of the year (9 catches for 77 yards coming into the game), so I doubt that he's the one.