Dear Himanshu, there is currently no such provision for downloading notes of One shot Videos but we will definitely take your request into account & see what we can do.

For now what you can do is while watching One shot video you can take screenshots as well note down the points which are not being highlighted in the video. 

Also there are notes provided for each chapter in Revise notes section on Learnohub.com which you can definitely download & make use of.