That is bizarre and difficult to prove. Does he have your phone number? IMEA number? The problem is that it takes some skill to use those devices and random use without a warrant is illegal.

If you really feel this is going on, the FCC would be very interested to hear about your issues with illegal use of a transmitter. (1-888-CALL-FCC)

Blocking one upload takes more than just incepting cell communications, so again, this is a weird scenario.

basically making so that the upload can’t happen from my phone to youtube’s servers.