How does VideoPlus work?

[armours]

How does the VideoPlus system work? There doesn't seem to be any pattern to the codes. Is it sent by radio or something? Somebody must know!

[geofbob]

It's a code. See http://tallyho.bc.nu/~steve/videoplus.html.

[jenstar]

The link given by geofbob doesn't work because the final full stop has been included in the URL. Try this one: http://tallyho.bc.nu/~steve/videoplus.html