Close-range interference - suggested sources?

[Doofer 0]

Okay, so perhaps I should've used a free hand to remove my hat - instead of an aircraft - but viewing this short video , can anyone suggest the likely source of the thick black & white band of interference visible in this?

The site is relatively far from civilisation, and you can appreciate just how close the transmitter was.

(My mobile 'phone was on - but I've had it on before & not seen this sort of thing)

[Mr.RC-Cam 126]

Now that's using your head.

I would start by eliminating the possible external sources. That would include turning off the cell phone. BTW, if you're using a patch or other directional antenna on the Rx, and the noise occurs mostly when it is pointed away from the model, then the issue might be minimized by aiming the antenna.