I have reviewed this document as part of the security directorate's 
ongoing effort to review all IETF documents being processed by the 
IESG.  These comments were written primarily for the benefit of the 
security area directors.  Document editors and WG chairs should treat 
these comments just like any other last call comments.

The summary of the review is Ready.

This document provides an informational reference for examples of the Session Description Protocol (SDP) Offer/Answer exchange mechanism, for the most common Rtcweb use-cases.
   
The security considerations section points to documents describing the security architecture for WebRTC as a whole, which is appropriate for such an informational document.