I've had countless dislocations and multiple shoulder surgeries, that is a classic subluxation. The angle of contact meant it wasn't dislocated completely, but it was very solid, jarring contact to the bicep/shoulder which slammed the joint out of place. You can see his whole arm shift whilst the rest of his body doesn't (too solid for his own good). He took the entire impact of Dureya to the arm/shoulder without torso support.
In contrast Dureyas arm was cushioned into his torso.
The head clash was secondary.
The majority of the time, if required, you can back up and play after subluxations. Could have a cleanup after the season. My guess is that was his approach, but after Sunday theyve all decided it's pointless given where the season is at and Jobe's own obvious fatigue.