Creative Commons is an international nonprofit organization that empowers people to grow and sustain the thriving commons of shared knowledge and culture we need to address the world's most pressing challenges and create a brighter future for all.
“Twenty Years of Creative Commons (in Sixty Seconds)” by Ryan Junell and Glenn Otis Brown for Creative Commons is licensed via CC BY 4.0 and includes adaptations of the multiple open and public domain works. View full licensing and attribution information about all works included in the video on Flickr.
Creative Commons Course on Intellectual Property
Internet Archive
Provides access to videos, images, sounds, and more from all over the web. Not everything is Creative Commons but much is free to use under a variety of licenses
Wikimedia Commons
A vast, largely free to use collection of media
Openverse (Creative Commons Works)
Search creative commons works on Openverse, formerly Creative Commons Search.