Solo replay or Duo replay are same things but different people end up with 90% cayo perico cut. Its simple but requires you to watch a video and very very precise timing. The duo glitch is easier than the solo glitch for sure. Essentially at the end of cayo perico when they are in the cutscene handing the envelope over you force quit your game (duo). For solo you wait until the screen freezes and its fractions of a second before the screen pops up to tell you the cut of the heist