How do I cite a speech I found on YouTube in Chicago style? (footnote)

Working on a final research paper. I’m trying to cite A speech by Martin Luther King that is on YouTube on why he is opposed to Vietnam War. I can’t seem to figure out how to cite it. Thanks!

Submitted May 14, 2019 at 02:06PM by 75Revoh http://bit.ly/2Q0P0C2