Hi Michael -
How are you? Well, I hope.
You should transfer the tape to a digital medium at your earliest convenience (there are video services/duplication houses that will do this for you). The magnetic particles that hold the information on the dozens of videos we all own are not a perfect storage medium, as they fall off and are easily corrupted. Once you transfer to digital, the liklihood of damage will be lessened.
As far as making the information available, I'm sure there are people who will be happy to buy copies of unedited Jennings, though probably not so many you can finally open that pub and devote your life to putting down bangers. That's all you English guys dream of, right?