OK, so I know that these two channels in particular gear their shows more toward the American viewer. Sometimes maybe over exaggerating a little bit. I have been seeing a lot of their recent documentaries getting a lot of flak about them providing some incorrect information. Is this true? Are these broadcasting's becoming a little bit more far-fetched nowadays?
Questions about the History Channel itself come up once in a while here; catch up on some of the conversation here
There are also many threads which ask about historical accuracy of specific programs; a quick search of "history channel" or program titles will turn up pages of posts with more specific feedback
You may also find this discussion of the BBC vs American public/commercial broadcasting of interest