Easiest route would be to just purchase a older DropCam off eBay for under $50. If you only want to access it on demand, you won't need to pay for the subscription/cloud storage package but you will still get alerts when it detects movement if you wish. There are of course many other options, but this is by far one of the easiest.
It's been interesting to watch his daily patterns. He'll chill like this above his cold hide for about two hours a day while everyone is away at work and school and the dog has finally stopped barking. Then he'll go hang out in his hot hide until everyone gets home, then back to the cold hide and then at right about 3:20AM every morning he has a party and just cruises around the tank for like an hour. He's certainly got a routine.