Across the lands of Equestria, Discord sends devices so that everyone can hear and see a message from him: The message being a multi-segment lesson in some of Equestria's lost history. With various guests, they shall recount such events as the real version of Hearth's Warming, forgotten heroes and villains, and wars few could imagine today.

"All viewers of this program are invited to leave their own questions for Discord and his guests."

Note: Not really an AU so much as putting in new material with only minor bending to canon.
Inspired by the "If The Emperor Had a Podcast" videos.