When I searched for videos of the Persian Tar I have found a set of interesting videos by the Homay and Mastan Ensemble, a Persian Ensemble that plays the different Persian instruments. Those videos are very interesting and show the different Persian instruments and the Persian music very well.
This is my playlist of the Homay and Mastan Ensemble:
Another playlist with the Homay and Mastan Ensemble:
Addtional Informationen
Homepage: http://www.homaymastan.com/
Wikipedia about the Mastan Ensemble: http://en.wikipedia.org/wiki/Mastan_Ensemble
Videos at wn.com: http://wn.com/Mastan_Ensemble