In the CoP meeting held on September 14, 2012 Negin Mirriahi gave an excellent presentation on CLAS, a Collaborative Lecture Annotation System (CLAS), recently developed by Arts ISIT and the Department of Psychology that allows students to annotate and flag important parts of a video.
More information about CLAS can be found here: http://isit.arts.ubc.ca/support/collaborative-lecture-annotation-system-clas/
Here is a link to a short video: http://isit.arts.ubc.ca/project-showcase/innovative-learning-approaches/