If you click on the actual YouTube version, more info in included...
High Resolution, complete scans of Atomic Bomb FCDA Footage from shot Grable (1953). Grable was an atomic artillery shell, shot out of a cannon and detonated on Frenchman Flat at the Nevada Test Site. No sound. Filmed at 64 frames per second (normal speed is 24 fps).
Yield was 15 KT.
Distance to Ground Zero: 2,938 feet.
Camera elevations ranged from 11 ft 3 inches above ground to 18 ft 9 inches high.
Check out other Atomic Weapon Effects on our Weapon Effects Playlist: