Vipul’s Classroom was a collaborative project between Ruinan Liu and me to publish short educational videos related to mathematics. The YouTube channel is here. Most videos were shot between April 2012 and July 2012, and a few were shot between August 2012 and October 2012. New videos are no longer being made, but existing videos are still available for viewing.
In 2013, there were about 30,000 minutes of video views as recorded by YouTube’s analytics.