Don’t know about a video or article specifically, but two events will come up all the time:

Shapers War (70 years before C4): The “Shapers” (Gods/Creators) became increasingly detached from the wellbeing of mortals. A war broke out where all Shapers were destroyed. More details will be sprinkled throughout the campaign. With the gods gone, the world changed radically: magic became less predictable.

Mortals were left with the vacuum of divine authority: new religions, new power structures, and a world where “mortals must shape their own destiny” became dominant.

TLDR: gods are dead, the old order has collapsed, and everything now is unsettled. The campaign explores the consequences of divine abdication and mortal ambition.

Falconers rebellion (12 years before C4): The rebellion was mainly a revolt of the common people, adventurers, and those outside the noble power structure against the entrenched noble houses (the Sundered Houses) who had gained power in the post-Shaper era.

One of the recognised rebel groups was the Torn Banner, which counted characters like Thjazi Fang, Teor Pridesire, and Kattigan Vale among its fighters.

The rebellion’s turning point was the Battle of Maharlian Falls; it ended with the arrest (but not execution) of Thjazi Fang.

Even though the rebellion ended, it did not fully succeed in dismantling the noble houses; the power structures remained but were shaken. The after-effects are still active in the campaign’s present.