Bungie had to show bloggers' videos as evidence in court because the company constantly deletes old content in Destiny 2

Bungie, the developer of Destiny 2, faced an unusual situation during a copyright infringement lawsuit. Due to its practice of "vaulting" (deleting old content), the company was forced to use fan videos from YouTube as evidence in court.
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The lawsuit was filed by writer Matthew Kelsey Martino, who claims that Bungie used elements of his work to create the Red Legion faction in Destiny 2. Bungie dismissed the allegations as baseless, but because the original Red War campaign is no longer available in the game, they had to rely on fan videos to defend their interests in court.
The original Red War campaign was removed in 2020 and is no longer available even for internal use at Bungie. The company is gradually restoring some content, such as raids, but the return of old campaigns seems unlikely due to technical difficulties and the need for significant resources to restore them. The lawsuit is ongoing, but there is no information on its outcome.
Source: Gamefile