Many people are doing "spectated runs" where they play on one device and spectate this device on a different device like their phone or another computer. You do this by hosting the game on the device that you record on and joining the game on the device you are playing on, and press "join as a spectator" on the recording device. (Make sure that the run is recorded on at least 15 fps or 30 fps if it's a top 3 run.)
all of the server lag is allowed but the framerate lag isn't (mostly)
the time that it says you get at the end of the game is not the official time of your run
yeah we don't really know why that is happening
6:51:100, 6:51:200, and 6:51:000. The funny part is that these runs aren't even that good
you can clip the last object near the ending just a bit so it wasn't frame perfact