The Smithsonian Institution recently released their Collections Search Center online tool which searches over 2 million records with 265,900 images, video and sound files, electronic journals and other resources from the Smithsonian’s museums, archives and libraries. You can specify that the search return only results with online media. It is also possible to browse by topic, as well as by place, culture, language, and more.
A list of currently available collections is available here, and more collections will be added over time.
Above image: The Gopis Search for Krishna from a Bhagavata Purana, ca. 1780. Freer Gallery of Art and Arthur M. Sackler Gallery.