Be careful what you promise!

Remember those fun adverts for Scotch videotapes with the living skeleton? Thanks to YouTube we can see them again. Here's the one I remember the most:
And here's another one predicting the flatscreen TV quite well, although making a rather rash promise...
"Every recording as good as the first or we'll give you a new tape."

Does anyone want to put that to the test and invoke the lifetime guarantee? After all the advert is pretty explicit that Scotch tapes should still be working as good as new after all this time... And there are still people who use their VCRs for recording because it's "good enough" for the task at hand.

Scotch was a trading name used by 3M Select. Their UK website no longer sells videotapes but they did promise to guarantee the tapes for life... Or will they give you your money back?

Alternatively if you used your Scotch tapes to preserve video recordings for posterity and still have some (I think I still have a 1993 recording of a Doctor Who story on a Scotch tape somewhere) then they made promises about those too:
And for some bonus points I noticed that one of the tapes advertised is Betamax (and the second advert has a third cassette but I don't recognise it at all). Does anyone still have both tape and player to test the limits of the guarantee?