[Rinehart]

There is one thing that has been puzzling me since I got a fast Internet connection, and that is: how on earth do certain kinds of video clips appear on YouTube and other sites like it?
I'm not talking about scenes from Magnum, P.I. or whatever. I am talking about things that haven't seen the light of day for more than fifty years, like the BBC's "Bat Wing" station ident counting down the seconds to the start of a program, and the segue into the opening credits to Farming, a show from the early 1950's. Surely this has been in an archive for at least 55 years; how does it get out of the archive and into circulation? (Go to whirlygig-tv.co.uk to see this clip.)