This appeared online this week:http://www.allnewsweb.com/page1199999505.php
I managed to contact the guy who posted it via this site. He just claimed they were there at the back and that he didn't really want to post it but one of his mates who's into paranormal incidents said he had too.
Been analyzing it closely and whilst it does corroborate certain facts, like the truck, the line across the road and the other two vehicles ahead of it, I'm still unsure about the legitimacy of it.
However, to go to that trouble to create a fake is some doing, particularly as setting fire to a road is a illegal and there were no ads or other links on the original clip leading to somewhere else, so you have to wonder what the motive would be as well.