You do realize attorney's cost MONEY right? And the vast majority of people cannot afford an attorney's assistance. I mean if you are in the 6 figures and up club like most of Hacker News you can probably pay for a legal plan where the attorney can file to get paid a couple hundred bucks for the question you asked but still.....

(this is the part where I get sent links for a bunch of "free" legal resource links, that will totally respond to your email and return your phone call. Totally)

So as a random citizen you can't do a cost benefit analysis of whether to talk to the police but you can somehow evaluate whether a law professor, seemingly unrepresentative of his profession, is giving good advise in a bizarre Youtube video? That's some selective learned helplessness.

If you are too ignorant to evaluate whether to talk to the police then you are too ignorant to evaluate the accuracy of the video.