The person who captured the video was driving near March Air Reserve Base on May 16 when the jet, which was armed with live ammunition needed for its NORAD alert mission, went down.
A burst of flame can be seen on the left side of the shot as the pilot ejected. The jet then stays airborne for a while before the video stops as the aircraft crashes.
The pilot, who was the only occupant of the aircraft and has not been identified, landed at the airfield near Cactus Avenue and Meridian Parkway where a parachute was spotted. He was said to be in good condition.
Officials say the pilot did declare an emergency before ejecting, but won't confirm a possible cause.
The aircraft crashed at the end of the runway and into a warehouse, where the building's sprinkler system was set off. A CAL FIRE chief said despite initial reports, a small fire did not ignite. The 215 Freeway reopened in both directions between the Cactus Avenue and Harley Knox Boulevard exits after closing for about 24 hours while the military dealt with the ordnance.
The military has not released a cause for the crash, and the jet is still inside the building.
The aircraft was flying with a "standard armament configuration," according to the official who could not provide details on the contents of the package due to operational security commitments. The armament had been secured and was disposed of in accordance with Air Force policies and regulations this afternoon, officials said.
Chopper video captured the detonation at Ben Clark Public Safety Training Center in Riverside.
Michael Messisca of the Riverside University Health System said 13 adult patients were received after the incident. Three were "trauma activation patients." Those three were admitted to the hospital with non-life-threatening injuries and are currently stable. The other 10 were treated for fume and debris exposure and discharged in good condition, some of them were first responders, officials said.
Witnesses say the F-16 fighter jet was flying in tandem with another aircraft at low altitude when something went wrong.
Chopper images showed a large hole on the roof of the building. Capt. Fernando Herrera with Cal Fire and the Riverside County Fire Department said the first fire unit to arrive confirmed the military aircraft crashed into the tilt-up building.
Authorities conducted a search and the people inside the building were evacuated.
Fire officials and other agencies created an evacuation zone of about 4,000 feet from the area of impact. Most of the evacuation orders around the crash have since been lifted, however the buildings nearest to the crash are still off limits until the fighter jet is moved.
A photo from inside the building appears to show part of the plane sticking out of the rubble. Jeff Schoffstall said he was working when he heard the plane come dangerously low to the ground before it made a loud noise. He posted video from inside the building.
Another employee talked about witnessing the aftermath of the crash.
"It was almost to the point where I had to cover my ears, and next thing you know I just hear this explosion," said witness Daniel Gallegos. "I turn around to the back of the building and I just seen a burst of flames and just the ceiling start falling through every part of the building. In a matter of seconds, my ankles were filled with water."
The United States Air Force Reserve said in a press release that the plane was conducting a training mission for NORAD at the time.
The pilot is part of the 144th Fighter Wing, an Air National Guard unit based in Fresno.
The aircraft belongs to the South Dakota Air National Guard in Sioux Falls.
The investigation into the crash is ongoing.