The video shows the words "Boy and "Girl" written across a target that's surrounded by tall grass in Green Valley".
As a gunshot rings out - apparently fired by expectant father and USA border patrol agent Dennis Dickey - the target explodes in a blue cloud, igniting the surrounding area in flames.
Exploding targets are prohibited on the Coronado National Forest, and any type of recreational target shooting isn't allowed on state land where the fire started, officials said.
The fire burned 47,000 acres.
The Justice Department said that Dickey had placed a highly explosive substance known as Tannerite inside the display and then shot it with a rifle.
As part of his plea agreement Dickey will make a public service announcement with the Forest Service about the cause of the wildfire.
The video, shot in April, shows the explosion that started the sawmill fire near Tucson, Arizona.
Speaking to US Magistrate Judge Leslie Bowman last September, Dickey told the official that the fire was a "complete accident".
One of the commenters where the video is posted on YouTube, wrote, "I feel bad for the poor baby boy who's inheriting those genes". It took nearly 800 firefighters at a cost of $8.2 million to extinguish.
A news release from the US attorney's office said Agent Dickey will make an initial payment of $100,000, then make monthly payments after that. He also was ordered to pay $8,188,069 in restitution, starting with an initial payment of $100,000 and monthly payments thereafter.