I have a low regard for the History Channel. I have seen documentaries there occasionally. When they are about a subject I know well, even one that is well documented such as the Battle of Midway, I have seen that they are filled with mistakes. They are written by people who know nothing about the subject. The production values are sloppy. In the Midway documentary, the voice-over announcers had no idea how to pronounce Japanese words, and they don't bother asking anyone.
They resemble Wikipedia. Perhaps Wikipedia is the source of recent ones, come to think of it. - Jed