a smashed up semi gets taken apart, what can be saved set aside, then the panel taken apart at the seams, but cutting out the spot welds and using a cutting torch, and using an interesting modified chain hoist to pull the crushed cab open

Skip the first two minutes at least, and change your speed setting to at least 1.5 time

I am in awe of the hand craftsmanship, the fundamental mechanics, and the basic tools used to get the smashed metal panels made right again.... body shops in the USA? Might, but I haven't seen any do this type of work. 

Notice that they don't have a socket wrench, a spot weld drill from Eastman, and no vice grips, just basic blacksmith tools