Videvo - Free HD stock footage & motion graphics for any project!
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Coverr - Beautiful free stock videos for any use
Unsplash Wallpaper - Gorgeous wallpapers on your Mac
Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android