I have one question.

When I watch the recorded video of this game, it appears that after taking the handgun in the first room where you take the handgun, the slasher moves all the way to open up a spot when going through the incoming slasher.

I have just done this myself hundreds of times and have never been able to reproduce this technique.

Is there some update or something that has come in that makes it impossible to do this?

I watched the recorded video and the distance is not the distance that a normal camera can set in the Haydee options.

If you are using a mod or something like that, wouldn't this fall under the "editing saves or game files is banned." rule?