Licence in in the zip: Despite being marked at CC0 it is a CC BY 4.0 with custom non-redistribution clause.
You should put the license in the description then, so people can know what the license is BEFORE they download it.
Also why would it be marked CC0 if the license is different? That would cause confusion, and you should also be careful with the wording for custom clauses/licenses, as they could render your work legally unusable.