 It is also available as a video on demand service, depending on the service provider, and in various Internet streaming and download formats.The channel was launched as Smithsonian On Demand in 2006, and became "Smithsonian Channel" in 2007.Smithsonian Channel Plus, a US$5 monthly subscription also offering access to the channel's past content library, and incorporating the former Smithsonian Earth streaming service, was launched in 2018.