A mega-list of all known BBC ‘John Peel Sessions’ online, at May 2020. As you might expect, it’s nearly all at YouTube.

[youtube https://www.youtube.com/watch?v=ChvHhf-9ZKw&w=560&h=315]

 
In a similar folk-curation (done by ‘curatives’?) vein, Weird Tales: 1923-1954 complete in a handy linked spreadsheet, taking you through to Archive.org.