Hey everyone. Just wondering what John is doing here for practice. I can't quite figure out his patterns. Thanks.

Looks and sounds like major arpeggios in a "C shape".

Make an open C chord, bring the shape up the fretboard - that's what he's doing. Make sure to fret the G and E strings that would usually be open on the open chord.
And no, Guitar Hero will not help. Even on expert. Really.