Jesus, why would you waste Tor's limited bandwidth on personal cameras. Throw it behind a VPN and that's it. It's like trying to record your camera footage in blockchain bad.

Because any use of Tor's network is a good use. If you only use Tor for child porn and other communication that can get you behind bars in your jurisdiction, any Tor user is an automatic suspect. Using Tor's bandwidth for mundane things helps the whole network.

Out of curiousity, what benefits does Tor bring here? Wouldn't a domain + VPN (or simply HTTPS + password protection) + a restrictive firewall work as well?

I use a VPN when the router have a public ip (static or dynamic). Behind CGN there are not many alternatives to onion services.

Running a VPN on a cheap VPS is a much better alternative.

Ah, didn't realize you could use Tor as a poor man's TURN server. That makes sense.

... thinking about it, has anyone tried to actually use Tor to provide TURN/signalling functionality for WebRTC? Seems to me you could get true peer-to-peer WebRTC calls relatively easily this way.