Am I right to understand that all those cams are pointed to the street / public places?

- I think you would be wrong to understand that. How on earth did you reach that conclusion?

But how is that different from the thousands of live cams over youtube or the wider internet? Or the poorly secured CCTV watching every angle of any street in most big cities.

- More than one thing can be wrong at once. Requires nuanced thought I accept.

The author then uses face search engines to find personal information on the individuals. That is the creepy part.

- I think he is demonstrating the creepy opportinities. Did he share any of that information? I think anyone with bad intent probably probably not make a video explaining what they did.