Syncope.
The drop in blood pressure means you cannot get enough oxygen and glucose to your brain.
In this case the lady was just announced as the winner of a beauty pagent. It is likely that she was vasodilated (big dress, hot lights) and then had a situational trigger (being the winner).
Errickson collapsed whilst playing for Denmark against Finland at the Euro 2020 competition. He got an implantable defibrillator and returned later to again play international soccer.
Damar Hamlin of the Buffalo Bulls suffered ventricular fibrillation caused by a particularly ill timed strike to his chest. This is "commotio cordis" a rare cause of sudden death, usually in athletes following a blunt strike to the chest. In this case despite quite prolonged CPR Mr Hamlin made a full recovery and returned to playing football. Since the sudden loss of blood pressure caused a collapse then yes it is syncope.
Drop attacks as seen in the video are a type of epilepsy. The collapse comes from a primary cerebral problem not because of a drop in blood pressure.
The young man in the video shows an example of "Valsalva" syncope. The increased intrathoracic pressure causes a decrease in venous return to the heart.
It is reported to be about 75% sensitive. Unfortunately Reggie Lewis was diagnosed as having vasovagal syncope but later died on the basketball court with complications from HOCM (Hypertrophic Obstructive Cardiomyopathy).
https://vimeo.com/928168743?share=copy
You wear heart bugs for 4 weeks. Patients complain about the stickers on your skin.
Loop recorders are generally implanted for 2 years.
The history does not suggest a vasovagal syncope. The ECG does not support WPW or Lown Ganong Levine syndrome, both which develop tachycardias using accessory pathways.
The ECG has the characteristic "coved" appearance of the QRS in V1, V2, and V3. It is a channelopathy and the patient is prone to getting VF or polymorphic VT. Both bad.
When startled the goat---which comes from Tennessee, USA---stiffens. Involuntary myoclonus. It lasts 5 to 10 seconds then passes. There is even an "International fainting goat association" which is poorly named.