Use an Unified Plan SDP instead of Plan B

[antonroman]

The original SDP used for the post was generated by Chrome browser some years ago so it follows the Plan B specification. Maybe it could be good to use a new Unified version SDP as it is the only official one and Chrome/Chromium are adding support to it and will be the only one supported in the future.

[fippo]

well, the unified plan that ships in Chrome is actually a bastard thing as it has a=ssrc:12345 msid:something lines in addition to the standard a=msid. We should/could update the example to explain that line though!

Also both Chrome and Firefox still have a=ssrc lines even though everyone said "lets not signal ssrcs" -- that turned out to be not very realistic :-)

[antonroman]

:-) yes, you are right. Maybe a good option could be to use a reference SDP from draft-ietf-rtcweb-jsep. It would also be helpful to add the bastard lines Chrome and FF use (in different colors) letting the readers know that they are non-compliant with the draft in the explanation.
PS. very interesting your last Simulcast post by the way :-)