When you watch this, you'll hear the commentators mention the same deficiencies we're hearing through training camp. . . passes too hard, choosing where to throw the ball before snap, etc. You'll also see some of the issues we've seen during camp as well, namely off-target (mostly too high) throws and throwing into double+ coverage.
If I can Connect the dots on these issues, then I know the coaches have seen them long ago. Thankfully, Heupel and Halzle are incredible QB coaches. If they can help him correct, or limit, these mistakes, I think he will start and be successful.