He is very left foot dominant, but from what I saw this season, it comes across worse in these videos than it does in actual game play. He has a dominant left foot, but has still got pretty good touch with his right. 2:15 is an example of pretty nice cross on his right.
It's certainly something he can and needs to continue to work and improve on, though.
Honestly I can't wait to see him in our shirt. I think he'll surprise many doubters. He'll link up with Morata/Mandzukic very well IMO, all we need is a proper trequartista who will connect well with the forwards.
Oh I'll be there to see the Lechia - Juve game I hope to see him playing live