Wish we had a documentary channel in Europe! We do not. The Americans have: The Documentary Channel, that also offers a very valauable newsletter that advertises the broadcasts of the channel AND a so-called Docstore, where films can be bought or downloaded.
Coming soon is a series of Robert Drew documentaries, including the classics ”Primary”, ”The Chair” and ”Crisis” (these films can also be bought in Europe, of course). In clips Drew gives anecdotes about the shooting of these and other films in his retrospective. Entertaining and informative doc film history.