The official way to use copyrighted music on YouTube is through YouTube Studio > Audio library. The audio library includes free music and sound effects, some of which don't even require attribution.
In 1997, the United Nations Office of Legal Affairs, Codification Division, established an audio-visual library under the Programme of Assistance in the Teaching, Study, Dissemination and Wider ...
The Codification Division of the Office of Legal Affairs recently added the following materials to the United Nations Audiovisual Library of International Law: two lectures in English and French on ...