I'm not so sure. Safety glasses in particular are normally required in areas where there is a danger from flying projectiles created by machining, grinding, welding, etc. type operations. While the robots were certainly wearing their PPE because of the welding sparks they create, in the assembly area there is none of that type of hazard created. In fact the last thing they want there is flying projectiles that can get into the new cars and create problems.
So you may have specific areas of the plant where specific PPE is require - masks in the paint area, glasses in robotic welding areass, hearing protection in a loud area, but not all of it in all areas.
As to attire, I have only been in auto plants in the south of the USA and there everyone was dressed as if they had just come from (or were about to go to) the bar. JMW, the 'mono azuls' or blue coverhauls normally seen in European manufacturing floors is not widely common here.
Notwithstanding that, that did look staged, but they would have done that if filming right in the middle of their shift. Doubtful that this was done during a regular shift because they wouldn't stop the line to set up some the camera shots that were taken.
rmw