This is an Ocarina of Time 3D Any% NG+ speedrun done in 39:59 (timed from file start until the credits text appears) done by me. The footage is kinda blurry in Link's house at the start, but clears up afterwards.
This run uses New Game+ (starting a new file with an item on B, in this case Farore's Wind) to beat the game as quickly as possible. This is possible due to a glitch that the co-developers overlooked. If you do the Bottle Adventure glitch to get a desired item on B, then get on a horse and quit, when you start a new file you will have that item on B. This run also uses Wrong Warping to reach the credits without beating Ganon. By setting Farore's Wind in a specific location and then warping to that location while starting an after-dungeon cutscene, you can warp to many places. Setting Farore's wind in Goron City as child and then returning there during the Dodongo's Cavern end cutscene allows you to warp to the credits. The credits take up a large chunk of the video.
This run isn't too difficult aside from a few luck-based things and skipping the slingshot in Dodongo's Cavern (need to use very precise jumps to get around flame platforms). The controls aren't exactly OoT 64 tier either :P. I think about 30+ seconds could come off of this while using the exact same route. Slapping myself now that I look back at the torch lighting in Goron City, wasted ~8 seconds re-lighting the stick twice and putting it away manually after torch #2 before grabbing the pot. Just one of those silly things I didn't notice until I re-watched the run.
I didn't put that many attempts into this and I know with some more practice I could get a lower 39.