Interesting performance of "Dazed and Confused" by Jimmy Page and The Yardbirds. It's essentially the same as Zeppelin's later version, but features the exact same lyrics as Jake Holmes' original.
Jake Holmes Original Version, 1967 Buy this song at Amazon
Led Zeppelin version from Led Zeppelin I, 1969 Buy this song at Amazon
Be warned, the first few episodes feature some very experimental examples that won't be to everyone's tastes. If you think that's you, start with Part 4, which is when he gets to the likes of Grandmaster Flash, Negativland, and Brian Eno and David Byrne.
VARIATIONS, Curated by Jon Leidecker
Pictured above: Negativland