The current license holders have uploaded the entire series to their YouTube channel in 1080p. The World at War is the definitive version of one of the greatest documentary series ever made. Narrated by Laurence Olivier and first broadcast in 1973 when memories of the Second World War were still clear in people's minds and the war's veterans numerous, over 26 episodes this unique series assembled these recollections, together with archive footage, to create one of the most powerful and successful historical documentaries ever seen. The voices of those that fought, worked or watched during the war gave each episode a vivid sense of what it was like to be there and was the hallmark of the series.
Found via HUKD