Watch discovery channel Live Streaming online free. Discovery Channel (formerly The Discovery Channel) is an American satellite and cable specialty channel that broadcast documentaries and many other programs. It is a publicly traded company run by CEO David Zaslav. It provides documentary television programming focused primarily on popular science, technology, and history. In the U.S., the programming for the main Discovery network is primarily focused on reality television themes, such as speculative investigation (with shows such as MythBusters, Unsolved History, and Best Evidence), automobiles and occupations.