I discovered this bug when trying to speed up the level and it helped me beat the last record by 4 seconds, I just need to check it but I'm showing it to help.

You have to hold down the "W" key to advance in the loading screen. On one of the attempts, Ed should almost fall onto the platform ahead as seen in the video and you must get up when the giant ball is right above you.For some reason that combination takes you to that place on the map where you save a lot of time and I would even say that it is even easier to achieve the speedrun.

It's a pretty complicated technique

if you set records for the level, then yes

and if it is for a complete passage, then it will probably be very difficult and not used

Honestly, I could try it more times to find out if there is a technique so that it can be achieved on the first try, but it would be difficult to explain.

In any case, it advances you 4 or 5 seconds for the speedrun of the level which is too much