I don't use a security camera but I do rig up a webcam on an old laptop and watch my laying females from my phone or other computer, to see what they're up to. I also do this on the rare occasion when I get a new WC chameleon, to make sure they're eating and drinking.
I think it's a great idea, and there are probably affordable options out there, I just wouldn't know as I haven't looked into something more high-tech than a webcam. But I'd be curious to know as well if someone recommends something.
Great idea for a weekend that you're out of town, too. Because if you have a misting system and adult chameleons that don't need to eat it's ok to leave them at home, but it's nice to be able to check on them and make sure the lights are still on, that the mister is working, etc. And if not, to be able to call someone to go over there (like a reluctant family member who would rather not babysit but who would come over to fix a broken light if they had to). More peace of mind.