YouTube is indeed a very handy resource. Although I have and do use it, I'd caution against leaning on it *too* heavily, or indeed on any classic revival recording or you'll end up simply mimicking some-one else's 'reading' of the song rather than singing it for yourself. I think that's also the way standardisation of some of these old songs has come about within the contemporary folk scene.

Take for example 'The Snows they Melt the Soonest' which is in fact quite a bitter and almost cocky little piece from a ditched boyfriend where "bitterness and love, grief and contempt, mix".
Yet, it seems Anne Briggs slowed down the melody, and that lone act by one influential revival singer changed it altogether.
Here it is today: Boo hoo hoo!

I don't call that 'the folk process', that's the power of the recording industry.