More than a decade ago, when we were all using VCR tapes (or video CDs) rather than DVD players, there were a few guys who came forward with a pretty nifty idea. Why not use VHS video cassette recorders as a backup solution?
Tapes are/were cheap, VCRs were widespread and the whole system was pretty much reliable and well-documented. Somehow, VCR backup and personal computers never got well together.
Actually that solution existed since the 1980's when a company named Corvus sold VCR Backup as an option for its server.
It is a pity that VHS backup did not grew up to be a major force in Tape and streamer world. There were some attempts; The Danmere Backer 32 was one of them but it was too little, too expensive, too slowly and too late. It would allow you to backup up to 4GB of data.
I also remember clearly that UK's What Video Magazine had an advert about a similar item back in the early 90's. The concept was apparently popular in Russia under the name of Arvid.
Anyway, now, even DVD players are on the brink of extinction thanks to the Internet, Personal Video Recorders, Cable and Satellite.
You can read a few more on a Slashdot post called, >Using a Digital Camcorder as a Tape Drive and >>Using Video Recorders for Backup by Stuart Cheshire.