These videos are very cool if you're a football junkie, they are the SC guys getting together and running practice on their own during the summer. I'll post a few of them below. You get a good look at ground level of guys like Barkley, Lee etc...
My favorite part of the first video is at 2:36 when Wittick throws the pick after incoming true freshman Nelson Agholor gave up on his route. 5th year senior Tony Burnett (LB this year, Strong safety last year) gets all up in the freshman's face and tells him to run his routes.
Here is another video.
That Barkley to Lee throw at 2:40 was sick. Matt threw it into a seam between a host of defenders. One takeaway I have from watching the videos is that Wittick seems to have a very live arm compared to Kessler's arm, and Kessler has a pretty big hitch in his throwing motion.
Here is the channel with plenty of other practice videos