Guinness World Records copyright claims hundreds of speedrun videos, says it was done in error
If you had a world record speedrun uploaded to YouTube, the Guinness World Records might have tried to copyright claim it earlier today. Record holders began to notice that the world record-keeping organization was copyright claiming dozens upon dozens of speedrun videos after requesting permission from some content creators to re-upload the speedruns on their official channel. These were not copyright strikes, therefore none of the channels were affected negatively by the claim, but the monetization of each video was frozen. When the issue was brought to the attention of Guinness World Records, they stated that it had been an error with YouTube's automatic content ID system, and that they were working to undo all of the falsely made claims against the speedrunners. Guinness also mentioned that if any speedrunners are still affected, they can reach out to their official Twitter account to resolve any copyright problems.
Source