Those guys had the right idea but several factors stacked against them.
They should have used a longer nylon yank strap. The little Nissan couldn't get up enough momentum to cause any real "pull".
The Nissan also is not very heavy to begin with and they should have turned the Nissan around so that the yank would pull the front of the Nissan up and transfer the weight to the back tires, where it is most needed for traction.
When we're at the Dunes, my 3/4 ton Ford diesel is known as the "tow" truck because I can get ANYBODY unstuck, motor homes, trucks with BIG trailers attached, doesn't matter what it is, even if it's burried to the floorboards, I can pop them right out.
My secret? Low tire pressure and a long 50' x 4" wide nylon strap. I usually let them attach the strap to their vehicle, keeps them from ******* when the bumper comes off. My end is on my receiver hitch with a big A$$ clevis pin. My truck in low range with about 10-15 feet of slack in the strap. I tell them to ease into the throttle when they see my truck move. I'm moving at about 10 mph when all of the slack is gone and the strap starts to stretch and pull.
Inertia and stretch is what does it; a 7,000 pound truck moving at 10 mph is a heck of a lot of force on that strap.
At Pismo Beach in California in 04 I pulled out a motor home with the fully loaded trailer.
I think I will call my truck "toe mater".
Tom