Evaluate ANY multimedia source for expert credentials, informative purpose, and currency.
1. Find the website of a national organization in your field. Look for videos and other multimedia on the site.
Sample: The "Video and Audio" page of the National Association of Social Workers leads to a YouTube page for their association: http://www.youtube.com/socialworkers
2. Check the department or school website for your major at the University of Mississippi. For instance, the School of Education has some videos attached to faculty profiles.
Sample: Profile of Professor Dennis Bunch: http://vimeo.com/25465568