Here is a video detailing the Back in Time glitch in Twilight Princess 
Hopefully this helps you understand the trick better!
EDIT: It seems as though the first evidence of this glitch's existence was from YautjaElder back on January 14, 2007, so as far as we can tell, that is when the glitch was discovered. Might not be accurate, but that's all we can find. Shoutouts to ppltoast for bringing my attention to this.

Thanks to these people for helping with information in the video:
Dragonbane -  https://www.youtube.com/channel/UCYys...
Habreno - https://www.youtube.com/channel/UC47_...

Outro Music by Jonny Atma
https://www.youtube.com/channel/UCK9H...