Well, whether it ticks the correct boxes or not, I certainly think that 'experienced performers of traditional folk songs' are an extremely valuable public resource on a virtual community like YouTube.
It's probably one of the very few places that 'ordinary folk' (as opposed to 'folk music enthusiasts' - who, as we are getting into semantics, are arguably no longer 'the common people' at all, but instead a rather small and somewhat insular group) can easily gain semi-direct access to folk music by real people, and traditional English/British songs sung by err 'singers of traditional songs who play funny old instruments and seem as good as the real thing to me..'
Whatever you call it. I'd like to see lots more of it out there. Because I'm never going to get old Fred from down the way to teach me these songs, old Fred (if he ever existed) probably died thirty years ago. YouTube is as close to 'oral communication' as I'm (or anyone like me is) likely to get. It fills a big empty space between polished studio recordings by bands and (if you can't read music) pretty much nada else.