Short transcript from a YouTube video (title: 'Does WebRTC use SSL?') where two speakers briefly clarify WebRTC encryption: Speaker B says WebRTC uses DTLS (a UDP-adapted variant of TLS) to negotiate session encryption keys; Speaker A adds that browsers enforce secure signaling (HTTPS and secure WebSockets), which run over TLS/SSL.
Does WebRTC use SSL?
WebRTC uses a variant of TLS for encryption that is called DTLS. It is a variant of TLS that is adapting to the lossy behavior of UDP and that is what gets used to negotiate the actual encryption keys used for the session.
Okay, and you can also say that browsers actually enforce using security for the signaling, hence HTTPs and web secure websockets, which end being over TLS again which is SSL.
Because APIs like getusermedia are restricted to a secure context to require TLS, and from there you can't connect to an unsecure HTTP or WebSocket, so it's TLS all the way.
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