Make sure you understand the copyright requirements of any images or video you incorporate into your own work or share with others. Remember that citing the original source is not the same as getting permission to use a work protected by copyright.
Copyright: All creators own the copyright to their work once it is fixed in tanglibe form. Assume all work published after 1922 is copyright protected. In this case, you must first get permission from the copyright owner to use the work, sometimes for a fee.
Creative Commons: A Creative Commons license often allows most non-commercial uses of a work, with attribution and sometimes other limitations. See the specific license for details.
Public domain: Works in the public domain can be used by anyone without restriction.
Fair Use: In some cases (e.g., such as criticism, commentary, parody, that are especially relevant to education, etc.), you may use a portion of a copyright-protected work without permission. Determining what constitutes fair use can be tricky. Learn more.
To learn more about copyright, see Columbia University Libraries's Copyright Quick Guide.