Just curious are the runs timed in RTA or IGT?

Full game runs use RTA. Time trials also use RTA, however this is only because the inital launch of the game had a horrible in game timer, which is why you might see some time trials that say 1.0 have their RTA 5 seconds slower than IGT. The first patch made RTA and IGT match perfectly, so they are essentially interchangeable now. Using RTA just means that the runs done on the initial patch can still appear on the leaderboard alongside the newer runs with a fixed timer. Only Full Game runs need an on screen timer like livesplit, since time trials have one built in (don't cover it in the recording please)