Also, making machines that do the work in bulk is IMO a much better use of time than e.g. organizing beach cleanup efforts where a dozen people come out with grabbers: https://youtu.be/A_ESkZmbL2c
What would also be neat would be something like an organization that operates these on beaches across a state / country. Even better: get the government to do it.
Even better than that: outlaw production of the kinds of junk that ends up on beaches. Start doing takeaway food in glass lock containers and bags that are actually reusable (not paper or thicker plastic or cotton) and charge deposits for them. Sure, it creates other problems, but those are usually better problems to be solving.
That machine looks like an excellent way to take in macro plastic and convert some of it into micro plastic, and then redistribute it onto the beach, where it'll be impossible to remove.