I believe there are some FPV blokes that occasionally fly similar at the same field I fly at.
Seem to work well enough but with a high revving pusher prop they are as noisy as hell which might explain the music over the video!
Flown FPV from the average 'field' (with trees and hedges) it is all to easy for the 'line of sight' rule to go out the window in fact you only know it is flying because you can hear it - but then as I don't fly FPV I would complain wouldn't I!