If it were more of a need I would be good with taking him as high as the 2nd round. Can play both tackle and guard. In that video he was playing tackle but I personally think he was at his best once he was starting at guard for the last 5 or so games of the season (a duck fan i know who i have a lot of respect for in his evaluation has said that Long has short arms for a tackle. I also really like his mobility at guard where he can quickly get to the 2nd level, can pull and trap and all that fun stuff). I would bet that he's going to be the most athletic o'linemen at the combine so will probably shoot up draft boards. I like him, and think he's going to be a great pro but I dont think the Seahawks need o'linemen bad enough to take him where he would need to be drafted.
I dont have an espn insider account or anything but i've read that McShay now has him as a borderline first round guy.
Another ultra athletic offensive linemen that i really like is Menelik Watson from Florida State. He's from England and doesnt have a ton of experience playing football but he's an amazing athlete and dominates physically. Seems like a perfect Tom Cable project.