In-character alternate history radio broadcasts and podcasts?

What are some radio broadcasts or podcast episodes that were presented as in-character from an alternate history?

War of the Worlds of course had the famous radio broadcast that acted as if the events were real.
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Within the Wires is an entire podcast series set in an alternate 20th century. Each "season" is made up of a series of different styles of audio recordings (psychiatric tapes, art museum audio tours, office dictations, &c) and takes place at a different point in the timeline. It's from the same people as Welcome to Nightvale.