in this world record 2 player 8 phases video, their game freezes at 53.52 until 56.27 = 2.75 seconds

when i play the game it freezes at 53.81 until 56.74 = 2.93 seconds.

here is a clip. https://youtube.com/clip/UgkxUH-DGeINs8a1LF5YYQRdJ_Rq_1XyAGaV?si=Pd7viyE-SiEEWjGa

why does the game freeze for different durations of time? anyone know what's happening here?