I have a hard time believing this video, the SUV broke up into too many parts.
I can’t tell if it is an SUV or a pickup with camper shell. The way the back end shatters it loos more like a camper shell and bed liner flying apart. Looks like one can see air bags or else the vehicle rolled under the large truck.
Tractor trailer appears to have attempted to steer a little bit towards the shoulder. After impact he appears to have jack-knifed with his cab going to the right and trailer aiming to the left.