I have worked on construction sites most of my life. I agree, IF you HAVE to pullout, pulling out fast is the best option A much superior option is a Roll Back, or Traveling Axle Trailer. The load in the video was indeed dropped very effectively.

I agree, truss plates are very substantial, and very difficult to remove. However, many times a complete house of components are unloaded in this manner. This includes wall sections, with lumber on edge that does not flex as easily as a truss. Wall sections are assembled with simple nails, possibly cement coated ring shank nails, but not nearly as secure a connector as truss plates.

I have seen many broken parts as a result of unloading like this. In addition, the steel bands often break and fly around just looking for someone to cut up. If you look closely at about 20-22 seconds you can see a band already broken flopping around on the bed of the trailer. Also notice the man who very likely activated the roller lift system run out of the line of fire. He has seen the carnage before.