Real time TV travels at the speed of light.
It's not real time TV, it's a heavily encrypted, serialized data stream being passed over what's basically an IP network. Try streaming multiple webcams at the same time, on the same pc, on the same link, and see how well your bandwidth holds up
Now, do the same thing, with even more data, 2 way communication, error correction, and a wireless router flying around at 30,000 feet.
Our military bandwidth has always horribly lagged commercial bandwidth. It's being fixed, but it's not a fast process. It's marginally standardized at best right now. LINK4, LINK11, LINK16, ATDL-1, IJMS, PADIL, LINK22...