You do NOT want to miss this!! The Secret of Sherlock Holmes
They've cleaned up the audio you may have heard before (on YouTube )
They describe the visuals that have been lost to time from crew interviews
They've included snippets of the crew telling backstage stories!
I know because I was lucky enough to actually see the play.
Part II is just commentary and is linked from this one
UPDATE: @ninasnakie asked if this was AI. I'm not sure if that means the whole play, but the the short answer is that if it was faked, it would have had better sound.
The recordings of the play (the best of which is on YouTube) were made by fans who snuck in their tape recorders, and the sound quality is pretty terrible.
So the podcaster (a reputable pro with a fantastic podcast - The Jeremy Brett Sherlock Holmes Podcast) used multiple copies to combine and cleaned it up manually and mentions in the second part that he did use AI to help clean it up, so you can make out what they're saying, and they have a really good discussion about that.
They didn't include all of the play audio, just key / most scenes and used crew interviews and descriptions / summaries in between. Even some of the key scenes are extremely difficult to hear even at maximum volume. I'm sure that a lot was completely useless.
I hope this helps!