I believe that last one is "U-Boat War", which was a three-part documentary put out a few years ago. It is, in my opinion, one of the best documentaries out there and includes interviews with Erich Topp, Otto Kretchmer, and Reinhard Hardegen, Herbert Werner (author of Iron Coffins), and Michael Gannon (author of Operation Drumbeat).
Does anyone know the source of the Battle of the Atlantic YouTube videos and/or the color U-boat videos? I'd like to buy the DVDs if available.
Thanks!