Visibility is a good metric to use when targeting false information. If an account with 0 followers is sputtering garbage, not much harm is done. But if an account with millions of followers is sputtering garbage, maybe it's more worth the effort.

Beyond that, YouTube has been heavily moderating content on covid. They display labels very similar to the ones Twitter is under fire for now. The only fundemental distinction is everybody agrees the virus is a plague.