All respect to your grandparents. Such rocket's job is normally solely psychological if compared to Scud unless it caries unconventional warhead as it has no real effect on military targets nor even on civilian targets. However, in your case it was unbelievable as about 10000 rockets were launched at the UK. That's a huge number of rockets that reflect so much damage even in modern life.Not a badly made video, its a truly horrific list of weapons. My grandfather was invalided out of the war (WW2) after losing a leg at Dunkirk in 1940. He spent the rest of the war as a volunteer fireman, always active during air-raids. He and my grandmother told many stories of the V1's flying overhead, they were apparently quite terrifying because of the random nature of their targeting, everyone would wait to hear if the engine cut-out, if it did, they knew they were at risk. Nothing the Germans did ever weakened the British resolve to fight Hitler, but the V1's were one of the Nazi's most feared weapons during the entire conflict.