It's only a matter of time until a private company provides this service.
I thought of doing this years ago.
At the time, I imagined paying people to install cameras in vehicles, and selling access to the database to law enforcement, employers, spouses, etc. Now, that probably isn't necessary. The company could just scan the millions of photos and videos that are posted publicly every day.
If some company isn't already experimenting with this, I would be amazed.
In the end, this will be done, either by the government or a company; probably both.