It looks like he's an enthusiast who likes to share his collection rather than out to make money (the ticket prices are from free to $11m so may just cover costs). Apart from copyright, the issue may be that he does his own restoration. It's not just the Eagles, it's The Beatles, Fleetwood Mac, The Kinks, Chicago and so on.
Here's something about a Beatles show he put together
http://www.youtube.com/watch?v=ikje9YS8Lag
He doesn't come across as being much different to a fan making bootleg videos available on a website so unfortunately this could end up looking like big, bad millionaire rockstars bullying the little guy.
For me, this is a tricky one. I support an artist's right to protect their copyright and yet I love to listen to and watch the old recordings. If the artist was to release the footage, I'd be willing to pay.