Who Sells the Video?

You can buy the VHS video of Fermat's Last Theorem (aka The Proof) from WGBH (US NTSC format) in America. It costs $19.95 plus delivery.

You can also buy the VHS video of Fermat's Last Theorem from
the BBC (UK PAL format), but be warned that they charge an
extortionate educational rate. To find the video,
just type Fermat into the keyword search.

And don't forget that the programme is often repeated on various
satellite channels, so taping it off the TV is always a possibility. Or you might try to borrow the video from a university lending library.