Copyright and Fair Use principles also apply to different types of media including images and videos. You might also find that creative works including images and videos may have Creative Commons licenses where the creators specifically say which types of sharing they are allowing for the different works they have produced.
The Creative Commons organization was founded in 2001 as a means of permitting creators to license their work for public use under conditions they specify. Although not an alternative to copyright and not an indication that a work is part of the public domain, Creative Commons licenses permit the holders of copyright to define more clearly, than perhaps modern copyright law interpretation allows, how their works may be used and give users of copyrighted works greater creative freedom when they know, without question, how copyrighted works can be incorporated into new creations.
Learn more about different types of Creative Commons license here: https://bit.ly/2bNifVP
Here are several excellent sources for images in the public domain and creative commons-licensed content:
Creative Commons Search - Allows you to search for CC-licensed material by media type
College Art Association Image Sources - Links to free, restricted and unrestricted, image banks.
Flickr Advanced Search - Choose “Only search within Creative Commons-Licensed Content.”
Google Advanced Image Search - Use the “Usage Rights” field to limit by license type.
Library of Congress: American Memory - A free “digital record of American history and creativity.”
Library of Congress: Prints & Photographs Online Catalog - Photographs, prints, drawings, posters, and architectural drawings, and more.
NGA Images - Public domain artworks from the collections of the National Gallery of Art.
Noun Project - Free clip art images requiring creator credit.
NYPL Digital Gallery - Illuminated manuscripts, historical maps, vintage posters, rare prints, photographs, and more, from the New York Public Library.
US Government Photos & Images Public domain images by topic.
Notable collections: NLM History of Medicine, US Fish & Wildlife Service National Digital Library, National Park Service Digital Image Archives, and Smithsonian Images.
Wellcome Images - All images are made available under Creative Commons licenses.
Wikimedia Commons - Browse or search for freely reusable images.
Wikipedia Public Domain Images - List of public domain image sources on the web.
This list was recreated based on sources from the NYU Libraries Copyright guide by April Hathcock which is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
YouTube Creative Commons License information is available online here. Review this page to learn more about when it is acceptable to reuse videos on YouTube.
Fair Use and Copyright for Online Education: Examples: Video Created by the University of Rhode Island University Libraries
This website provides several scenarios of when you might want to use a video in different classroom settings and discusses the copyright and fair use implications for each.