What the video shows
It shows the area between the top of the upper arm bone and the acromion. Tendons and the bursa pass through this region and may become more sensitive when overloaded.
Video
The space below the acromion
The video focuses on the upper part of the shoulder joint and the space below the acromion. It provides an anatomical reference; assessment shows which movements and loads matter for the individual person.
How this may feel
Discomfort often appears with arm elevation, dressing or overhead work. Pain intensity and the exact point in the movement vary from person to person.
A sensible next step
You do not need to avoid every movement. It is often more useful to find a tolerable range and build a gradual plan for returning to load.