Sony brought Betamax to market in 1975 and briefly owned all of home video. By 1988 it had agreed to build VHS machines under its own name. This episode dissects how that happened. Sony had shown its Beta prototype to rivals in 1974, expecting them to adopt it. JVC, then a subsidiary of Matsushita, refused and developed the Video Home System instead. Betamax delivered a sharper picture, about 250 horizontal lines, but its tape ran out in exactly one hour. VHS arrived in 1976 with two hours on a cassette, enough for a movie or a football game.

The larger difference was strategy. Sony kept Betamax proprietary and protected its hardware margins. JVC licensed VHS to RCA, Panasonic, Zenith, Magnavox, Hitachi, and Sharp, and later Korean makers such as Samsung and GoldStar pushed player prices under $200 by 1986. Video rental stores, paying $80 to $100 per tape and short on shelf space, stocked the majority format, and Beta owners found fewer titles every year. The popular claim that the adult film industry picked the winner gets a hard look here, and the economics of the rental shelf turn out to matter more.

• To match VHS, Sony added a slower Beta II mode that reached two hours but cut resolution to 240 lines, giving up much of its picture advantage.
• When RCA wanted four hours on one tape, JVC’s engineers resisted on quality grounds. Matsushita executives overruled them to win RCA’s American distribution.
• VHS held 60 percent of the North American market by 1980 and 90 percent of the United States VCR market by 1987. Beta’s share in the United Kingdom fell to 7.5 percent by 1986.
• Sony took some revenge when Blu-ray defeated HD DVD in February 2008.
• The last Sony Betamax unit was produced in 2002, and the final VCR, a VCR and DVD combination, came off the line in 2016.