Three dog would certainly hire a few brotherhood svckers to do the program for him.
The enclave definitely want to have influence with the "pure" remnants of the wasteland population for recruitment.
The brotherhood need more idiots to join them so they can use them as meat fodder as Elder Lyons rots like an old banana.
Talon company to get the word around that they are taking up ANY contracts.
There's another problem here, though. Especially concerning the logistics and usefulness of a TV broadcast.
See, a radio is a fairly simple piece of technology. If someone blew up my neighborhood, I'd likely be able to salvage enough stuff to put together a basic radio reciever, MacGyver-style. And it's not going to take much to power it. It's also a very useful communication source - all these ham radios your find points to a degree of communication between the various settlements. It's fair, I think, to assume that this is how most places communicate and exchange news back and forth.
A TV set is
much more complicated to build. And it's not something the average person is going to be able to put together. It's also moderately dangerous to try to do so (I used to work part-time at a PC repair center. There were a number of safeguards you needed to take into account when opening up a PC, but it was mostly to protect the computer from yourself. You had to be specifically qualified to even touch a PC monitor - there's the potential for a dangerous amount of static buildup in a TV set or monitor.) The number of still-working TVs is going to be a lot less than the chances of finding a radio that's undamaged enough to repair.
And the energy requirements for a TV are much higher. If you're a small settlement just struggling to survive; and assuming you could even get a reliable enough source of power for a TV set - you're going to have better things to do with that power than sit around watching TV all day.
A radio can run a couple batteries for quite a while. If all you're doing it listening in, then you can relatively simply rig a hand-crank to store enough energy to listen for a good while. Basically, there's not going to be a whole lot of people with the time and resources to bother with getting a TV working, even assuming there was something worth watching.
The resources for putting together a TV broadcast are even higher. It's much higher power to transmit, and requires a good deal more technology as well. Why go through all that effort when you're not even going to be reaching more than one or two very rich, powerful, and resourceful people in the whole Wasteland?
If the Enclave wanted to spread propaganda through TV signals - they'd have to also distribute the TVs to watch them on (along with a built-in power source.) When a radio is something everyone already has - it doesn't seem worth the effort to do much of anything with TV. (Not to mention that we're dealing with a devestated Wasteland - once you start adding luxuries you're moving farther from the "post-apocalyptic" genre, and more into another genre entirely.)
Now, of course, Fallout isn't about realism. If Bethesda said "everyone watches TV in the Wasteland," then that's what it's going to be. But I still don't think it makes very much sense. It might be kind of a neat sidequest if you picked up a TV signal on your PipBoy during your explorations - maybe some repeating emergency broadcast - and then tracked down the source to find an abandoned broadcast tower filled with skeletons and some operator who managed to die with his hand over the "transmit" button, or something. Just to be honest, though (and not trying to shoot down your idea, just giving my two cents) I just don't think working TVs as a common element in the Wastes would make much sense to me.