Advice on replacing a rear brake light bulb

[RMcG]

One of the two rear brake light bulbs is bad on my 2008 basic Yaris Hatchback. There is a plastic grill in the rear interior of the car that comes off with a screw driver as shown at the start of this video at
https://www.youtube.com/watch?v=YZ3LPRk4vwY . See also attached picture.

The video at the link above also indicates that you have to unscrew two nuts and take off the entire rear light assembly with all the bulbs and lenses. Yet after the removal of the entire light assembly, the demonstrator just twists the small bulb fitting (at 1:30 in the video) in a counterclockwise direction and removes that small fitting. It appears that the small fitting could have been removed without removing the entire assembly.

Is this correct? That is, do you have to remove the entire light assembly (or entire "light cluster") to replace a bulb?

Thanks,

R.