For music there's a predefined cost Mechanical License that covers the licensing cost of most music you'd want to cover. For visual art there's no centralized

For music there's a predefined cost Mechanical License that covers the licensing cost of most music you'd want to cover. For visual art there's no centralized structure like this, so you're at the whim of the original artist or counting on fair use. https://en.m.wikipedia.org/wiki/Mechanical_license https://en.m.wikipedia.org/wiki/Mechanical_license