In accordance with standard procedure, Samus discarded all of the items she collected on previous adventures before embarking on this one. This run aims for 100% item collection in the fastest time.
Super Metroid has a wide variety of time-saving glitches to exploit, many of which are explained on the SuperMetroidTricks page.
The in-game completion time of this run is 00:37:54, but since game timers have never really been good at rounding things up, it is shown as 00:37 after the game has been completed.
If you prefer to watch the fastest completion without getting all the items, check out Super Metroid in 38:41 by Taco & Kriole.
There is a second video encode that shows the gamepad input over the game video.
The author has hidden some secret messages in it that might be interesting to see!
The first streaming YouTube link leads to a High Definition encode without Input Display, and the second one leads to a High Definition encode with Input Display.