Honestly he doesn't look that OK, he did not look like he was taking those snaps at game tempo at all. Very relaxed, very little movement and footwork. I'm no expert though so maybe it is just me.
And if he was practicing with the ones, I didn't see evidence for it in this video. They showed two clips at the end there of Taylor throwing passes. The first clip, the ball was thrown to #1 Khiry Cooper, with #85 KC Hyland also appearing in the route. The second clip soon after showed D-Tray #27 in the backfield with Taylor; the pass was thrown to Kinnie, with SJB #83 also in the picture. I think there's some rotating around during the practices among all available QBs though, between the various units and maybe some rotation with the other players (as Kinnie/SJB would imply, but who knows - I don't know who the other starting WR will be this week unless it's #9 again). So I don't know if Taylor not working with the ones would mean anything right now.
Cool vid, though.
The fact that he is able to practice reveals that he is "ok". Without seeing him run there is no way to tell 100% how effective he is. Maybe Nebraska did this on purpose to throw off Oklahoma.
The second pass was completed to Brandon Kinnie, so I assumed he was with the ones. I watched it again and saw Tray in the backfield with him, but I also believe there is alot of rotation in practice.