I think those songs without a warning in the beginning ( ghost's happy days has no warning)

What warning should it have?

Happy Days should have put " Warning: This song and music video contain references to sacrifice. Moderately disturbing imagery and mild gore is also seen.

Candle Queen: doesn't need one, just references bullying

The Distortionists: Warning: some violent references and moderate profanity.

Two of a Kind: Warning: This song contains somewhat disturbing references to death.

Okay, thanks for the details. I've only watched two of these vids.

Also, Creep-P's ":Exorcism only warns of flashing lights. This should've been it's warning,

Danger: This song contains religious messages, severe references to violence, and minor immoral actions. If you are under 18 or are easily disturbed, do not watch."