Before DVDs, CDs, Laser Disc, and VHS videotape, and immediately after lasers enabled holography, RCA invented Holotape. The Holotape system used phase-relief holograms embossed into vinyl tape in cartridges to play a movie on TV at home. They demonstrated a system at the end of 1969, but it never went to production. Embossed holography is a huge business now though (since the early '80s), including those on credit cards and security tags. But Holotape started it all.
Burton Clay was a researcher at RCA from about '61 on, working on many projects including Holotape. He saved samples and 8 years after he passed away (in 2008), I picked them up on Ebay. Included is a strip of vinyl about 1cm wide with a series of images on it showing Ludwig Von Drake, Donald Duck's professorial uncle. This isn't a sample of the final Holotape. It looks more like a research sample. There are 8 other strips, all with apparently different images. There are images of graphics such as "RCA Holotape" and both recording and playback geometries, and a test pattern. This is a quick pic taken with an iphone by by coworker Sekyu. I'll get better pictures eventually.
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