Methane Monster II ~ Demise of the Arctic
Presentation by Jennifer Hynes on runaway feedbacks in the Arctic and the resulting threat of near-term human extinction. At youtube.com/watch?t=309&v=L19JBY0kNmo
There are links to the transcript and to the complete set of slides of the presentation at Jennifer Hynes' blog.
In case you are looking for the earlier presentation by Jennifer Hynes, called 'The Arctic Methane Monster's Rapid Rise', it's at youtube.com/watch?v=a9PshoYtoxo and is also displayed below.