Watched this on Amazon Video, having never heard of it.
A 2017 German film, set in Germany in the closing stages of the Second World War and based on the quite extraordinary true story of the exploits of Willi Herold (a story I wasn’t aware of, either).
It’s very good indeed.
Oddly, on Amazon it had a length of 4 hours..... but the (black and white) film ended after 2 hours.... and then started again in colour. I really liked the black and white, whole thing is beautifully shot. I’ll go back for the colour version some time.