Good video series. Going to get in the weeds here if you don't mind.
My only issue with video 2 is that it makes it sound like tension pneumothoraxes are singularly caused by penetrating wounds chest that act as a "one way valve". This is often repeated as dogma in textbooks but we know this is not the case as evidenced by excellent video #3 where we see tension pneumothorax being caused by a lung with an air leak into the pleural space without an open chest wound. We see this blast injuries, blunt trauma to the chest, a patients being bagged/on ventilators.
The trap I see a lot of my Soldiers fall into is:
1. Thinking that by applying a chest seal on a chest wound they've "treated" a tension pneumothorax when in fact they could be causing one. A vented chest seal does not treat a tension pneumothorax; it only prevents the progression of a tension pneumothorax. The treatment of a tension pneumothorax is the relief of pleural space pressure either by chest seal removal (if present), needle decompression, and/or thoracotomy/chest tube placement .
2. Failing to realize that you can develop a tension pneumothorax even without an open chest wound.
Dr. Shertz has an excellent discussion of this titled
A sucking (and blowing) chest wound is the sound of not dying
Dr. Shertz's Crisis Med incidentally does offer online classes; I have not taken them but have been impressed with Dr. Shertz's lectures.