Picture: Jonne Renvall, Tampereen yliopisto / Tampere University
"Open Educational Resources (OER) are teaching, learning and research materials in any medium – digital or otherwise – that reside in the public domain or have been released under an open license that permits no-cost access, use, adaptation and redistribution by others with no or limited restrictions." (Unesco)
Learn more about Creative Commons Licenses
About digital research services and open science: Think Open Blog (HY)
Besides TED Talks, you can find a lot of videos produced by experts and universities in Youtube.
From the copyright's point of view, the safest way to share a video, for instance, in Moodle, is to share a link to it.
This tab contains information about open learning resources and links to various kinds of freely available materials to be utilized in teaching and learning.
The Open Educational Resources can also be found in Finna.fi, which gathers materials from museums, libraries and archives under one roof. (The link takes you to the search restricted to the materials stored in the Library of Open Educational Resources)
In Andor, you can refine your search for Open Access.