Sources for Festival/Concert Live recordings

I’ve been going to TBF and RG for decades but have never tried to access any recordings. Is it true that tapers make their recordings available? If so, how can I get them? Since I won’t be able to attend or stream TBF this year I’m really interested in figuring this out.

Also, are there sources for recordings done at concerts? I’ve also heard that there are ways to stream live shows of various artists. Can someone please direct me to websites or ways to learn about this, both streaming live shows and accessing recordings of concerts and festivals.