For a video to be accepted the Musicbrainz Recording must have "official" in the disambiguation. Additionally, for lyric videos to be found, they will need to have "official" and "lyric" in the disambiguation field for the Musicbrainz video recording.
This should eliminate a lot of poorly named videos with bad information on Musicbrainz database, the path forward will be to correct and imporve the musicbrainz database over time...
RandomNinjaAtk