Please view the video for at least 45 seconds. This video contains interactive features like, chapters, a multiple choice question, comments section, and some links to the sites.
The tool used is provided at Hapyak, and is played in Hapyak video player. This video was originally taken from Khan Academy Youtube Channel. This can also be embedded with the youtube video player, as shown below (A bit tuning is required to make it completely interactive, currently not done).
This site is made by:
Abhinav Deep Singh
Tajveer Singh Sandhu