If I recall from the video, the husband had the gun pointed down and the ex got in his face and then tried to take the weapon from him.
Also, the Teal shirt guy is ordered to leave the property. Legally, he has been trespassed. Refusing to leave at that point is criminal trespass. From the moment he was told to leave, the Teal shirt guy no longer has any legal justification for being on that property. Yet he chooses to not only remain, but to:
1) move in a threatening manner towards the gun owner
2) physically come in contact with the gun owner
3) attempt to take (larceny) the fire arm from the gun owner
4) when the gun owner discharges (warning shot?) he advances on the gun owner
Teal shirt is the aggressor here. If I am on the jury, and this video is presented into evidence, I would not convict.
You can not go to someone else’s house, get up into someone’s face, refuse to leave when told to do so, assault and batter them, and then be portrayed as the innocent person.