There is no real way to report violations of material other than your own, but there are a few things you can do:
1) Again STOP sharing videos that are uploaded to FB by anyone other than the creator (often these videos have black bars above and below the main content with white text in them, as seen above). Giving a wee nod to the creator by listing their name does not absolve the page from breaking the law. Even linking to the creator’s page in the description does not change the fact that they have stolen the material.
2) If you can locate the creator, notify them of the violation so that they can report it.
3) Give Facebook feedback about videos:
A number of pages violate copyright law by uploading videos they do not own. (UNILAD is one of the most common offenders.) There is no way to report violations unless you own the material. It is likely they do this at least in part because the FB algorithm seems to promote videos that are uploaded directly, rather than those featured on external sites. Not only is that promoting copyright violation, it is depriving content creators of views and revenue.
Please:1) make it possible to report violations of copyright for material other than one’s own2) make sharing of material from external sites rate more highly in the algorithm(s) so that pages no longer feel a need to resort to such tactics