I'm currently working on a quadcopter that I'm equipping with several video cameras of various sizes/quality (i.e. one high quality, forward facing camera, then three or four cheap micro cameras arrayed all over the quad). My problem is this - switching between the 4 cameras. I'm looking to build a system similar to THIS, however with 4 channels and (hopefully) for far less than they're charging ($35 + shipping). Instead of controlling it with an on/off switch channel on my transmitter, I'm using a spare knob (0 thru 25% = camera 1, 26% thru 50% = camera 2, and so on).
Will 4 reed or solid state relays attached to an 8-pin PIC / PICAXE be sufficient, or does switching video require more sophistication? Obviously this is all on board a small quadcopter, so I don't think there's a need for any amplification or noise filtering. I mainly ask this because all the R/C video switches I've seen look to be relatively complex devices, leading me to believe there's something more going on other than connecting a certain pin to an output pin.
Lastly, if it matters, all the cameras are the same resolution.