It is nice that some clips are on youtube, but the quality there is wretched. This series cries out to be issued on DVD. An incredible catalog of Folk Revival performers, and wonderfully presented.
Sadly, it seems that the "folk community" does not support such projects - sales for some incredible reissues are pathetic.
In Japan and Europe, where copyright is 50years, much material from the USA is available, but sadly no US company would ever consider releasing.
Thomas.