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That appears to be an 89 foot pipe flatcar about to be unloaded by idiots. Those are not beams--they are sections of track. The average weight of American railroad track is 130 pounds per yard. Each of those rails are about 80 feet long and so, would weigh just about 3460 lbs. I am pretty sure the whole load exceeds the maximum safe loading for those fork lifts.

I'm guessing that the only person that knew this was a bad idea was the person making the video.

all they needed to do was add some cribbage between the rails and the backplate then tip the forks back and it would have been fine. four of those lifts could do that lift no problem but god damn, you have to use your triangle of stability or else exactly this happens, and you have to be extra careful with a team pick when you start to drive or else you get trouble. They were on a incline on the embankment so they felt stable but as soon as they rolled off that they found bad times.
idiot directing this thing had them clear of the car six inches below where he had them raise too. obviously this was poorly planned out too if they hadnt picked this kind of losd before they should have discussed the plan before and then got it done. Could have also loaded the backs of the forklifts down while lifting and tipoing to add a little extra stability then taken that off and driven back. if they had four Taylor lifts im sure they could have found a couple small forklifts to put on the back there tines pressing down on their counterweights. of course osha doesnt technically allow this in our country.

yikes

One derailed train car and a moment of agony, but a lifetime of Interweb infamy!