I can see one solution to that (albeit farfetched): an analogue to a super rigorous referencing approach. I am imagining it's possible to verify in an automated way that an edited video is exclusively constructed out of a list of cited materials. So if we would be able to build a database of freely licensed raw materials that can be sourced from (HUGE if, I know!)
While valuable, I think that original content is needed, be it homemade animations, or videos from events or places recorded by the user and never published anywhere else.
/Jan