They cannot "live" scout UK. The only team that can live scout a team would be their upcoming opponent (Purdue/Cincinnati). If the staff would want to go find film and start to break it down that way it is totally legal.
At this point the staff will focus on UAB/SMU/UCLA, get as much info on them, and go from there. After the staff has as much info that they need on these teams then the video coordinator will start working on potential future opponents Gonzaga/Davidson/Iowa/Duke. From there, they could probably work on some UK stuff since everyone knows they will probably be in the finals, past that it would be a crapshoot to who comes out of the other region so I would think that they would wait till sweet 16 or after to get the other region teams.