In celebration of the launch of Sonic Generations, Sega has released the first video in a four part documentary series about the Sega's blue mascot, Sonic the Hedgehog. The first video, titled "The Birth of Sonic", takes a short look at how Sonic became the mascot of Sega, replacing Alex Kidd. It's a short video, but I'd love to see the rest when Sega releases them.