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No video, but the aftermath of the 1999 Ford Crown Vic we used to own:
It was parked in a parking garage downtown, engine off, and self immolated. Ford's cruise control switch is hot, even when the engine is shut off. Cruise control switch is on the master brake cylinder, and should the cylinder develop a leak, it can wick up the switch.... The parking garage had been written up before for blocking the standpipes inside the garage, and this time, it caused more extensive damage to the other cars because the fire department had to run hoses from the street up to the third floor where the car was parked by their valets. The other thing is that when they park the cars, they roll down the windows and leave the keys in the ignition, furthering the smoke damage done to all the other vehicles.
You've all probably seen the viral video of a Tesla Model S on fire. My take, after reading everything I can find about the accident that led to the fire, is that I'd still much prefer to be sitting on a Tesla battery pack than 20 gallons of gasoline when the s__t hits the fan.
Here's Tesla's official response: