A friend sent me a link to a video that he worked on and he asked that I "do not distribute".
Afterwards I remembered something that the Ontario Educational Communications Authority or TVOntario (as it was later renamed) would do many years ago whenever they showed an old film or serial chapter on its programs Saturday Night at the Movies or Magic Shadows. Seconds after the film material would start to roll, up came a superimposition of white lettering: "THIS FILM NOT TO BE COPIED."
On one occasion my dad editorialized: "Big deal." If I remember correctly, he said that at the beginning of a Republic serial chapter; maybe G-Men vs. the Black Dragon.
"We copy that, OECA."