[8D] I can answer the your first question ;

The frequencys used for the video downlink portion of FPV lie within the FCC's frequency allocation for the Ham radio hobby . Specifically , one needs a "No Code Technician" license from the FCC to operate the TV gear at those frequencys . No license = Illegal operation , and this applies regardless of the mode of operation . Illegal use of channels is taken SO seriously in the Ham world that there are "vigilante Hams" that will track illegal signals just for their own satisfaction of turning the illegal operators into the FCC for punishment !

If you think there is class warfare in the RC plane hobby , you oughta take a look into the Ham radio hobby , as I did a number of years ago with the intention of becoming a Ham . What I saw was enough to make me say "no thanks" , and I restarted my long dormant RC hobby back up instead . For example , because proficency in Morse code is not required for the "No Code Tech" FCC rating , and most Hams who are Hams became so before such license was available , they look down in complete disgust at the "pretender Hams" as they call them , and call the rating the "No Good Tech"

Anyway , that's my input into this . Happy Flyin .... [8D]