I don't know what can have gone wrong with Youtube, but maybe your computer environment isn't the same as mine. I use AdBlock Plus, which may avoid some features of Youtube as it exists now, with extensive "monetizing" of content. I just went to the site and searched on "Manchester Rambler", and found 2 performances with no login required, while the little AdBlock icon showed double-digit eliminations of unwanted material.
Here it is performed by MacColl himself:
https://www.youtube.com/watch?v=YENYMwuCG2YAnd here it is sung by the Irish folk band the Dubliners:
https://www.youtube.com/watch?v=mrT2E2U4t18That word "ramble" is interesting. Dr Johnson (same guy who wasn't impressed by the scenery of Scotland) edited a publication called "The Rambler" which I think was meant to imply a person who walked around without much of a destination, but with the intent to find interesting things to see. And then there was a vogue for it in the 1930s, with the founding of the Ramblers' Association, which still exists. There was a "mass trespass" on the lands owned by the Duke of Devonshire and closed to public access, which was led by left-wing activists. Yes, communist hikers, it does seem strange! Ewan MacColl grew up with a father who was a trade union militant. He wrote the "Manchester Rambler" inspired by the trespass event at age 17, by which time he was already under police surveillance. (He would certainly use AdBlock Plus.) But apart from the name of the organization, I don't think anyone would say they "ramble" in Britain now. They'd be more likely to "walk". Americans tend to "hike" if they're serious about going somewhere.
https://en.wikipedia.org/wiki/The_RamblersEwan MacColl certainly led an interesting life:
https://en.wikipedia.org/wiki/Ewan_MacColl