JKB over at GunFreeZone asks if it would be legal to shoot if this were to happen in [your state]. Here is my opinion on how Florida law would handle this:
At the beginning of the video, the three in it were committing a felony (grand larceny) as well as trespassing. You cannot use deadly force to protect property. However, as soon as they saw that the homeowner was there, they threatened to shoot him if he came out of his house. That immediately raises the offence to carjacking, which Florida law 812.133 defines thusly:
“Carjacking” means the taking of a motor vehicle which may be the subject of larceny from the person or custody of another, with intent to either permanently or temporarily deprive the person or the owner of the motor vehicle, when in the course of the taking there is the use of force, violence, assault, or putting in fear.
It also constitutes robbery with a firearm, 812.13 (a first degree felony)
“Robbery” means the taking of money or other property which may be the subject of larceny from the person or custody of another, with intent to either permanently or temporarily deprive the person or the owner of the money or other property, when in the course of the taking there is the use of force, violence, assault, or putting in fear.
The felons here are shouting that they have a gun and are willing to kill you to take the car. That creates another felony, aggravated assault 784.021:
(1) An “aggravated assault” is an assault:
(a) With a deadly weapon without intent to kill; or
(b) With an intent to commit a felony.
Since both felonies use the threat of force, they are forcible felonies. A forcible felony is defined in Florida 776.08 as:
“Forcible felony” means treason; murder; manslaughter; sexual battery; carjacking; home-invasion robbery; robbery; burglary; arson; kidnapping; aggravated assault; aggravated battery; aggravated stalking; aircraft piracy; unlawful throwing, placing, or discharging of a destructive device or bomb; and any other felony which involves the use or threat of physical force or violence against any individual.
emphais added
So what can you do about stopping a forcible felony? Florida 776.031 explains that:
A person is justified in using or threatening to use deadly force only if he or she reasonably believes that such conduct is necessary to prevent the imminent commission of a forcible felony. A person who uses or threatens to use deadly force in accordance with this subsection does not have a duty to retreat and has the right to stand his or her ground if the person using or threatening to use the deadly force is not engaged in a criminal activity and is in a place where he or she has a right to be.
So in Florida, you would be legally justified in shooting all of them.