Natural or Organic farming from different schools of practice :
Zero Budget Natural Farming (ZBNF) by Subhash Palekar (Hindi) here (Youtube Playlist)
Naisargiki Krushi (translates as Natural farming) by Dr. L Narayanareddy (Kannada) here (Youtube Playlist)
Organic Farming by Akash Chourasiya (Hindi) here (Youtube Video)
Outclass with Sultan Ahmed Ismail about Organic Farming (Tamil) - Part 1 here (total 14 Youtube videos in this playlist)
Organic Farming by Nammalvar (Tamil) here (Youtube Video)
Regenerative Agriculture by Pradan here (a slideshow)
Natueco by Deepak Suchde (Hindi-English) here (a compiled Youtube playlist)
The NCONF (The national centre for Organic and National Farming) has made a comprehensive training manual on natural farming. This is published by the Dept of agriculture and farmer's welfare and contents are designed to provide end-to-end support for natural farming practitioners.