Collection of talks by educators from CORE-ED library - mostly short and would make great discussion starters - particularly good are the two I listened to by Stephen Heppell.
"...a long video from November 2009 in which Eric Mazur, who teaches physics at Harvard, describes the main innovations he has made in how he runs his courses - and the painstaking empirical research that he has used to guide these changes. "
"You can learn just about anything from YouTube…if you're willing to dig through millions of videos. Luckily, Course Hero has done the work for you..."
An OER site of video lectures, mainly focussed on science although spreading wider. European based but with contributions from the usual suspects (MIT etc)