This video is not exactly proof of anything... It is a single one individual's recounting some experiences, some of which are terribly out of context and reality denying.
This man's idea of bravado seems to be law enforcement officials jumping around and carrying on like they do in the movies - sadly the reality is that any one of these examples misses the facts that:
a) police officers do not know what they are walking into. They are not psychic, they do not posses x-ray vision and complacency is the number one cause of death to law enforcement officers. They co-ordinate because they don't want to die - they too want to go home to their families at the end of a days work.
b) in order for the police to be able to respond to and deal with every single crime which ever occurs, there would presumably need to be more of them then there are people, and they would have to have one on every single street, at every hour of the day - ridiculous.
In effect, certain elements are correct. Yes, Police forces are a gang which enforce a set of rules made by the gang's superiors - the machinations of law. Yes, sometimes these laws are unjust, unfair and whatever other label you want to put on them. In fact, in some parts of the world the only police are paid militia who impose incredibly awful regulations upon people which includes killing innocent people (Israeli police killing Palestinians on the street for instance).
However to assert that cops are cowards because they are cops is a non-sequitur, and the individual in this video uses some clever wording to effectively get that message across to anyone not carefully paying attention. Two examples are his references at the start to Aliens and Dinosaurs on tv with pictures of Police, then aliens to provide a visual association. The other is when he mentions police dressed as stormtroopers (basically they are wearing their PPE, just like a welder averts risk by wearing a welding mask, police wear riot gear to prevent their own injuries. Does one say that a welder is not brave because he wears a welding mask? Or that a person driving a car is not brave because they wear sunglasses whilst driving into the sun? Or that a man is not brave because he goes into a potentially deadly situation prepared to not die by equipping himself adequately?
I have watched a 5 foot nothing white female police officer walk up and put herself between 2 6 1/2 foot males who were about to engage in a fist fight, each with two or three mates either side of them (the offenders, not the officer, she only had her partner and he was still getting out of the police vehicle) and stop the fight and send all of the males on their way with no charge, no arrests and everyone goes home and has a good night. I have also seen cops walk so slowly that the offenders are gone long before they even get close (lazy) and still others walk around a large site on their own when it is known that there are multiple offenders inside.
So I have to disagree with the assertion that all cops are cowards and certainly based on this video (which really is a whole load of nothing - people will always present skewed views of themselves when pitted against others and this guy is no different; not only that but he relies on 3rd hand stories. How distorted are the facts when the third guy is telling the story that the first person may have never presented properly to begin with???) I can only disagree further.
Similarly, I agree that the best prevention of crime is in the spirit of community, and that knowing your neighbors helps and all that jazz but that still doesn't support writing off a police force - whose job it is to INVESTIGATE crimes after they occur, prosecute accordingly ACCORDING TO THE LAW (which is the real problem in most instances) and provide somewhat of a deterrent to idiots who think they are above the law and drink drive, speed and otherwise drive dangerously which is a risk to everyone else using the road as well as those who might consider crime as a career.