This is like uncovering new footage of background lore to iconic scenes you've known about for years.
I mean, this was like seeing footage at the end of Rogue One, of Vader massacring multiple Rebels with his red Lightsaber when Princess Leia's ship was boarded.
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Imagine seeing the first time Padme blew Anakin (presumably on their wedding day at Naboo) after the Battle of Geonosis and thereby doomed him to his dark side fate.
Imagine seeing footage of Stormtroopers destroying Luke's home and brutally murdering Luke's Uncle and Aunt.
Imagine seeing Darth Vader's words to anyone else in the vicinity of that gas mining facility (Cloud City Workers, Stormtroopers, a telecommunication with the Emperor), shortly after he told Luke Skywalker he was Luke's father. Imagine whatever he was saying to anyone in the room at Cloud City where he surprised Han Solo.
Hell, imagine seeing what happened to Sev during the event that got him missing from the rest of Delta Squad on Kashykk.
Imagine seeing what the members of the Fellowship said when they saw an unconscious Samwise Gamgee and Frodo of the Nine Fingers up close and personal, both having been brought back to safety by Manwe's Eagles. Or imagine what conversations they were having with each other at the Black Gates of Mordor before they knew the Eagles had saved Sam and Frodo. Or imagine having recorded audio footage of whatever Sauron might have been muttering after he felt the One Ring had hit the lava.
edit: This is also like some of the scenes in El Camino (the Jesse Pinkman movie released in 2019) and Better Call Saul (released in 2015, ended in 2022), which demonstrate alternate POVs that occur shortly before or after iconic Breaking Bad scenes (released in 2008, ended in 2013).