I happened to watch a video "Ajnatha vaggeyakarulu" on YouTube. This program is very interesting and informative.
This particular video is about Harikatha Pithamaha Sri Adibhatla Narayanadasu garu. This is hosted by Sangeethacharya Dr. Vyzarsu Balasubrahmanyam garu and it appears that he has done a dedicated research on the topic.
This video covers an interview with the descendents of Sri Adibhatla Narayanadasu garu, few of his compositions tuned and taught by Dr. Vyzarsu to his students and krithi demonstration in kutcheri format by various students of Dr. Vyzarsu.
Here is the link to the video .... http://www.youtube.com/watch?v=_Z07UeFG ... tube_gdata
These episodes are being telecast by SVBC (Sri Venkateswara Bhakti Channel) every Sunday at 9.30 PM...