long range transmitter or antenna in urban (not in line of sight)

Hello everyone

what is the best method to transmit a video signal in urban with distance of 1000 feet (approx. 300 m) ?

is this by using low frequency transmitter and antenna or by simply by using a high power ?

thank you in advance for your posts .

I have pleasure to know the answers from your experience :)

There are allocated frequencies for "wirelesss" security video monitoring systems, I believe in the UK the frequency is 2.54 GHZ. I doubt if the official licensing power would give you such a range.
Frank