Another great video is of Joshua Lavigne and Raphael Slawinski climbing the Cassin in a day. I can't seem to figure out how to embed videos from vimeo, so here's the link to his video:
Joshua Lavigne's Blog:
Colin Haley's blog is also one of my favorites. Read about their Alaska 2010 trip climbing both the Cassin and a new route on Mt. Foraker, Dracula, here:
and last but not least, Raphael Slawinski's blog is always good. He is a great writer and I always enjoy reading his posts.