| http://www.w3.org/ns/prov#value | - YouTube videos are usually viewed as being in the public domain, and so can be used without worry, but make sure that the images and other materials you use are also ???public.??? The easiest place to find images that are in the public domain is Wikimedia Commons; some electronic databases and sources also specify that you can use images so long as the original source is acknowledged and cited.
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