You can see which box the recordings are on so you know what is streaming from box to box.
You should be able to go to Saved > Recorded > See all > and click on the Recorded tab you will see a drop down with the following options:-
Recorded, Recorded on this Virgin TV box, Planned, and Planned for this Virgin TV box. - highlighting "Recorded on this Virgin TV box" will just show those programs recorded on that box.