Making an old track cleaner?

This is a real long shot, which i think is impossible, but if in doubt, ask the experts…

I exported the Martin Luther King Speech off of youtube, as i want to use it as a tribute to him in something i am doing. However as its old and recorded with crappy equipment , it isn’t that great. A lot of background noise and hum.

Ive tried the noise removal which hasn’t done all that much. Has anyone got any ideas how to make this sound clean?

You couldn’t find a clean “I have a dream” speech? Library of Congress?

thanks koz, couldn’t see it on there though. perhaps i am just not looking in the correct place