La Grange is such a great song though. I'd gladly put up with that.
Yeah, but he's not playing the whole song. He's playing the opening riff from the start until the drums kick in, and then he fadenoodles away for some random notes until starting up a riff from a different song.
So imagine this:
14 seconds - La Grange, ZZ Top, opening riff
10 seconds - random notes played in no particular order
7 seconds - Many Of Horror, Biffy Clyro, just the 4 chord changes under the verses
9 seconds - random notes
12 seconds - Back In Black, AC/DC, opening riff
22 seconds - silence, drinking a beer
12 seconds - La Grange, ZZ Top, opening riff
Repeat for 45 minutes.