It's not a random search, it's people running lights and speeding getting stopped and it seems the kinds of people who are in the streets committing crimes that actually hurt people have a tendency to not obey traffic laws.
People who commit crimes are probably more likely to get parking tickets too. Should police search the homes of everyone who gets a parking ticket since there's a slightly increased chance they'll find evidence of a crime by doing that?
Of course, they might catch a few mothers with prams on their way to said home, but that's a reasonable price to pay for not wasting so much time pulling people over!
Did anyone in the video get killed? Did anyone in the video go to jail? How many mother with prams do you think he would have killed?