This video demonstrates active muscle mobilization techniques for the upper and lower hamstring tendons using a tennis ball. It is part of website called Athletes Treating Athletes that is designed to teach athletes ways to self treat common injuries. Check it out at www.athletestreatingathletes.com. Information is set up by body region under the “Index/Body Map” tab and includes how to posts/videos on self muscle massage using a foam roller/tennis ball, joint mobilizations, stretching, kinesiology taping, and strengthening.
Here is a link to the blog post- http://www.athletestreatingathletes.com/stretching-series/hamstring-mobs/