Update:
I got a response from the company and basically what they said to me was their copy came from a transfer of a 16mm film. And It’s in the public domain. Their restorer Robert Kauspedas passed away and they own the master copy of the restored version that he produced, which he said was “still not that great quality” and that their version is available to license if I want to.
Im just going to ask if I can see the video because I’m not too familiar with the business of licensing something and whether it’s free to do so.
Update #2
He replied by saying he’s going to ask for approval from a producer and that will be in touch.
Thank you so much for the links to that PSA video; it was never shown here in Australia, and I never knew it existed before!