When Sr Pelo uploaded his Underpants Genocide Ending, there were five secret Gasters throughout the video. What some didn't know, but some do, is that if you manage to pause the video at those exact moments, there are links to puzzles.
After completing all the puzzles from the five Gasters, the answers form into a link that was unlisted until the countdown ended, making the video public with a change of the end.
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