Below is the video link for YathirAja Saptati Upanyasam by Paramahamsetyathi Srimad ParavAkkOttai Andavan, Sri Gopaladesika Mahadesikan.
Part 01 (Updated Visuals):
http://www.youtube.com/watch?v=rbE_x_b2dEU&feature=relmfu
Part 02:
http://www.youtube.com/watch?v=uuAZGuXuFgE
Part - 03
http://www.youtube.com/watch?v=rbE_x_b2dEU&feature=relmfu
Part...