Consensus is, if you're a law abiding citizen, unless there is some sort of royal mistake, there should be no reason for LEO to be kicking in your door at night or any other time of the day. No time to call 911 for verification. If you have a standard lock on the doors, it will get kicked in.
Screaming back at them at the top of your lungs "I have a gun and I will shoot! Do not come in!" might buy you enough time to seek shelter or a good barricade. By the way, where is your barricade area?
This scenario is another example to examine the security of your doors and home. Obviously this home owner desired some higher level of security since the video seems to have come from a security camera. Unfortunately cameras are like the real police. They are there to help clean up the mess. They are not meant as a preventative.
Real security measures for your home should include a steel front door with a dead bolt of at least 2 inches of solid penetration into a steel framework. Ask yourself if the door you have now will give you 5 minutes of reaction time. Will the door give you enough time to call 911? Will you have enough time to get to your safe zone? Are there natural barricades in your home you can use to your advantage? Do you have an alarm with a panic button? Is the panic button in your safe zone or next to the front door that just got kicked in? Does your alarm company monitor 24-7? Is the alarm on a hard land line that can be cut and how will the alarm company respond to a cut line?
How's your furniture arranged? Most households will have a clear path from the front door to the living room (or what ever you call the next room from the door) Can you artfully rearrange the furniture so there are obstacles in the way to slow an invaders progress? (when I was away on a business trip my wife did this and I found out the hard way when I entered into a dark living room! Worked real well!) Is there a heavy piece of furniture (a cadenza) that can be used for cover in the room?
The questions and answers need to be flowing.
Many think a gun is the first line of defense when in reality, at home, it is our house and possessions that needs to be the 'front line' between us and them. Our gun is the 'fall back' in a situation like EE shared.
To not stand against injustice is to stand for it.
Don't confuse my personality and my attitude.
My personality is who I am, my attitude depends on who you are.