A couple things, actually. The challenge rules state that the run is disqualified if you break any WDW park rules at all so that rule was broken when they set their park reservation for Epcot in order to join the 7am Cosmic Rewind VQ to get a boarding group, but then they changed the park reservation back to Magic Kingdom so they could start there, which is taking advantage of the park reservation system by working around it. This automatically is a disqualification, but to add to it, they didn't post a screenshot of them getting the boarding group immediately after they got it which is also a rule break. These two things don't even consider the fact that they were running through the parks, which may or may not be a rule break depending on who you ask, but is surely in poor taste considering you could hurt another guest.
It's just a shame because it completely dilutes the other legitimate attempts that others have tried since re-opening. They're claiming they're the only people to ever accomplish it during the 2pm Park Hopper rules, but are absolute frauds.
