Here's a combination of the Donovan recording and a nice edit of the Disney cartoon: https://www.youtube.com/watch?v=sal_pp_ptJQ

The comments say "Disney & Donovan teamed up," but I doubt that.

And here's a recording of Buffy Sainte-Marie singing the song on Sesame Street: https://www.youtube.com/watch?v=ub-XetKYDBw