Proof of Cash transfer between two friends

We were sitting in the classroom and the lecture was about to start. Mam was expecting for few more students to join us because only six to seven people were present in the class. At that time my friend Bachhi (Rahul) thought to return my 1000 rupees which I had given him earlier for some work but my another friend (whose name is also Rahul), told us to Wait. 

We asked him Why what happen ? Ohh... there he decided to take video of this cash transfer between me and Bachhi.

Sometimes I forgot that someone returned my money or not so Rahul took this video not only for fun but also a proof of cash transfer between two friends.