Hi Ray, at least some of these already have articles:

https://en.wikipedia.org/wiki/Ewan_MacColl
https://en.wikipedia.org/wiki/A._L._Lloyd

As well as this overview: https://en.wikipedia.org/wiki/British_folk_revival

(None of these anything to do with my efforts)

So I am not sure quite what you are saying.

Of course if there are online video recordings of relevance, once identified, they can easily be linked (by any wikipedia editor, or in fact anyone) to the articles in question.

Regards - Tony