[Tinian]

Here's a link to a film of the missile strike.

(It's in the bottom window.)

There appears to be two explosions. All you need to see is the first 10 seconds or so.

[rahbert]

To me, the first ten seconds of the video show the
ship firing its main gun, not a missile strike.
You can see the smoke coming from the muzzle. Also
a warhead detonation would create more flash.

I think this video is labeled in error.