Answer by Yash Dalmia:
This was an initiative by students of IIT Bombay on April Fool's Day this year.
The video depicts a '100 note lying on the roadside while a student with a camera discreetly films from a little distance away.
When one of the passersby happens to see the note, they pick it up.
On opening the `100 note, however, they see the simple message: “It takes equal effort to pick up a piece of garbage. #PickItUp."
Well played, IIT Bombay, well played.
Here's the link to the video –