The videos will be taken down starting March 15th: http://news.berkeley.edu/2017/02/24/faq-on-legacy-public-cou...
So you still have a day to run youtube-dl on whatever you want from their channel. Recordings from a 2014 CS 184 course can be found here: https://www.youtube.com/playlist?list=PL-XXv-cvA_iBifi0GQVF1...