Most drones use simple 5.8 GHz PAL video transmitter. So it is really simple to decode, the problem is that LimeSDR doesn’t have needed range (only 3.8 GHz max.). But there is possibility to downconvert 5.8 GHz into LimeSDR range, see this thread: Downconverter (and possibly upconverter) for 5.8 GHz band
