Disclaimer: I'm not a coach. Based off the picture, I think the RCB is playing the field.
Not sure what you mean by your question, I assume you know the difference betwen boundary and field, but if you don't, the field is the wide side of the field and the boundary is the short side. The wide hashes in college make it more likely that a team will flip their CBs than in the NFL where most CBs will generally play just the left or right.
I'm actually not sure where teams will normally play their best cover guy, boundary or field. Intuitively it would make sense to put your best guy to the field side just because there is much more ground to cover. But when you think about the different route options the outside WR has to run, they really are pretty limited. The outside WR to the field side will hardly ever run any out breaking routes, especially beyond 5 yards; the throw from the opposite hash is just too far. This allows the CB to play off more often than not, and it also allows the CB to sit on all in breaking routes.
The CB to the boundary is more likely to have to account for the entire route tree. Even though space is limited toward the sideline, a deep out or comeback is still a possibility. Also, since the QB is much closer to this WR, it makes much more sense to play bump coverage to the boundary, especially to redirect the WR toward the sideline even more. So I actually wonder if it makes more sense to have your best CB playing the boundary since that WR is more likely to see more balls thrown his way (I think the Gators play Janoris Jenkins on the boundary).
So if we take a look at this play, imagine it's being run from the right hash. The RCB is playing off coverage, which would make sense since any throw to his side of the field will be a very long throw and he'll have plenty of time to break on it. That CB can basically play a little softer and disrespect the deep out or comeback route (it would have to be about a 30-40 yd throw on a line). The LCB is playing bump on the boundary side.
To make this play "realistic," I'd just flip it so the off corner is always playing to the field side. Of course, pass speeds in the game are a little ridiculous and field spacing is much less important than it is in real life.