Open Multimedia encompasses many different formats of media that fall under open licensing. These can include resources like downloadable high quality images, website templates and video stock footage. However, it is extremely important to follow the license attached to the work as rules and restrictions can still apply.
Use Advanced Search in Google image to search specifically for Creative Commons licensed images under 'usage rights' Advanced Image Search
Or search Openverse for media (images and audio) that is made available under a CC license.