So...to answer the usage question: I help run a public access television station here and the church recordings will be aired on our channel. To that end, standard definition is fine, however, I would consider moving to HD for posting to the web, etc. We broadcast over Comcast and Frontier where neither of them will give us the bandwidth to push HD video - it takes up too much of their band. the fact that we are broadcasting pushes us away from cameras like GoPro or dashcams as mentioned here. We have a professional sound system so I use a product called PluralEyes to synchronize our sound to the video recordings and this integrates with Adobe so we get great quality sound and the video is just fine for our purposes.
To the power question, I do run them with batteries, however, I purchased larger batteries which are working fine and keep the cameras running for about 2 hours. I could have access to hard wired power by running new power to them - this would not be a huge job. With that in mind, I'm thinking I could go with the CCTV options mentioned in the responses....I'm thinking that since they could be constantly powered on, I could be in good shape when pairing them up with an App...perhaps?
The cameras are mounted about 15 feet high so there is no easy way to get to them on a regular basis, however, the good news is it gives me a clear path to them with a device for controlling them.
@Terfyn: Which smartphone app do you use for controlling your control my Panasonic HC-V750? These actually look like a viable option - they meet the "reasonable" requirement [@boya84: I'm looking for cameras below the $500-$1,000 range] but alas, they don't appear to be available from anyone....Amazon & Ebay. Additionally, the models which appear to be the replacements do not appear to even have WIFI capability.
All being said, the CCTV option does appear to be most viable - now to isolate something remote controllable.
@R.Proffitt: the dashcam/Action Camera option brings up a whole host of other questions for me....power is (I assume) rechargeable via 12 volt USB. This would now require my actually dismounting the cameras to plug them into a charger...? Right?