 CNBC has estimated that pornography was a $13 billion industry in the US, with $3,075 being spent on porn every second and a new porn video being produced every 39 minutes.A significant amount of pornographic video is shot in the San Fernando Valley, which has been a pioneering region for producing adult films since the 1970s, and has since become home for various models, actors/actresses, production companies, and other assorted businesses involved in the production and distribution of pornography.The pornography industry has been considered influential in deciding format wars in media, including being a factor in the VHS vs. Betamax format war (the videotape format war) and in the Blu-ray vs. HD DVD format war (the high-def format war).