detected unpaired devices and run associated command

Be able to scan for bluetooth signals from unpaired devies, and when you detect one, you run the associated command.

Use case:

A computer has a 10 min long video, and as a user with a bluetooth device approaches, its start the video playing (and stop scanning whilst it's playing). That way when people 1st walk up to it (when it's empty) it's not 1/2 way though a loop, and they end up watching the last half before the 1st half. Which is always annoying.