This Bart Sibrel smoking gun is ...uhm, neither smoking nor gun.
If you just watch the video without Sibrel narration you would simply never come to the conclusion that this was an "earth-faking" in process.
So the narration simply makes push - to make you see something that it is not.
In fact I can take the video and narate it any way I wish, I can even claim these are mongolian immigrants in submarine planting their own opium crop. It would witstand scrutiny as much as Sibrels version.
That's the problem with HB, they always go for push or narration that is otherwise not obvious. They want visual clues, but hoaxes are hardly dependent on visual clues.