BEVERLY HILLS, Calif. — Unfazed by the blue screen of death, they were dogged innovators who foresaw the possibilities of the internet way before anyone else. The story of the colorful entrepreneurs and their crusades with the new technology is the subject of the National Geographic Channel’s series “Valley of the Boom.” The docudrama explores the naissance of Silicon Valley, social media, wireless streaming and the information avalanche that was to bury us all. When it began it was filled with optimism, says Arianna Huffington, one of the show’s executive producers and an early proponent of the internet. “The mood you’re going to see here (on the show) is a mood of idealism, triumphalism,” she says.