I decided to actually make a video of the chapter 5 chest glitch. I figure it's much easier to see that way. I just recorded a bunch of footage from SNES9x and then slapped it together. Nothing fancy.
https://www.youtube.com/watch?v=z-WzTLkRejc
Copied from youtube description:
"This is just a real quick demonstration of the chest glitch in action. I don't know exactly how it works, but you can "move" certain chests to other locations within the room. The first three clips show three simple examples of moving the "aura blade" chest in the upper right corner of the room. The last clip just shows another example in a different room. That chest cannot be collected because once you move it off camera it disappears.
All of these have one thing in common: using the robot helper's (Magna) special attack and then quickly moving. I have no idea exactly how it functions, but I have been unsuccessful in getting this to "move" a key item chest. If we can move the magnet boots in the first room, we can skip essentially this entire chapter."