So I guess Ocarina of time is only 18 minuters long

[Moyu]

Cosmo (former WR holder) must be pretty devastated right now :p

Here is a explanation of how the speed run works and how short it became over time:

https://www.youtube.com/watch?v=aq6pGJbd6Iw

Pretty interesting stuff specially if you watch speed runs casually like me.