What is a torrent?
A torrent is like a broker between a customer and a seller. It works in a peer-to-peer setup that means a true democracy; all are equal, no master-no slave.
So you need to download a classic movie, which may be on a computer(s), located anywhere across the globe.
How would you know where is it?
Torrent comes to help you here. You google for a torrent of this movie. Download the torrent and voila!.
Torrent has three primary components:
a) Seeders: People that have a copy of the movie you want
b) Leechers: That's you!
c) Torrent file : It has information about seeders and leechers.
While you are downloading your movie, torrent share the downloaded part with anyone else interested in downloading the same movie. So effectively every leecher becomes a seeder. Now you are even! Hail Democracy!!