Video list: geeta, upanishads, dhammapada.

Upanishads

https://www.youtube.com/watch?v=_zLI8N7QDDc

Bhagawat Geeta

https://www.youtube.com/watch?v=PC0FW407FVs

Dhammapada

https://www.youtube.com/watch?v=MlyK_f-7pew

Chandogya Upanishad

https://www.youtube.com/watch?v=Jl0ezN3VRio

Maittreyana Upanishad

https://www.youtube.com/watch?v=fik-J71EMPA

https://archive.org/stream/yogadaranasutra00patagoog#page/n12/mode/2up



Naishkarma siddhi

http://www.exoticindiaart.com/book/details/naishkarmya-siddhi-of-sureshvara-NZB643/

Shankaracharya's commentary on the Upanishads
http://www.wisdomlib.org/


imp- katha (nachuiketa), mundaka, aittereya upanishad

https://www.youtube.com/watch?v=h-oHWn6czl8&t=2378s

brihadarnyaka Upanishad

https://www.youtube.com/watch?v=nHADPfvSIhQ