After gameplay I retimed this run using https://somewes.com/frame-count/ with a console FPS of 60 which is the GC native framerate according to http://tasvideos.org/PlatformFramerates.html and raw video framerate of 60 FPS for a total of 153359 frames or a Video Time of 42:35.983 RTA and 36:12.226 IGT. First Frame set on the frame the fadeout beggins after choosing "OK" and End Frame set on the frame that "Goal" beggins to appear on screen after finishing the final lap.
I use Nintendo GameCube Model No. DOL-101(USA) with Swiss 0.6 with "Mario Kart - Double Dash!! (USA).iso" loaded and GV-USB2 Capture Card. Console check at the end of the run.
Twitch Highlight:

Hello everyone! Recently a poll was sent out in the MKDD Discord about whether to switch to the in-game timer for Grand Prix speedruns. If you're confused as to why, you can watch these videos for more information: