This leads to a long, multi-part video which I did not finish. Judging by the first 45 minutes, it makes the case that there was a nuclear bomb in the munitions ship that exploded in 1944. However, it cites witnesses who say there were two explosions in succession, with the second bigger than the first. To me this suggests an accidental nuclear detonation secondary to an accidental conventional one, more than it does a deliberate test explosion in a US port.