If you're looking for live audio or video, YouTube is not a bad place to start looking. All kinds of rabbit holes to fall into for your favorite artists....
many of my favorite recordings are boots of live concerts. For musicians who improvise (eg, Hendrix, SRV, Garcia, Knopfler, Willie) it makes all the difference in the world.
And most people in concert, even Crow, stretch out songs, which can be nice.
it would be nice if musicians could be compensated for boots, but our copyright law is primitive.
My post was for the Internet Archive, a non-profit library of millions of free books, movies, software, music, websites, and more.
Google Internet Archive and go to the Live Music Archive from the landing page. It might not have exactly what you are looking for but it has tons of free live recordings.
Quality is hit or miss but I found an outstanding acoustic rendition of Neil Young's Cortez performed by a local artist in the Phoenix area.
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