Tested with 1.18.1-2.6.3 (no other mods).

I rendered a single timeline twice.

Original rendering without the option ticked:
https://user-images.githubusercontent.com/31929183/150643486-c1a578c1-82a2-4099-bd34-fa03eb0b032e.mp4

Rendering with the option ticked:
https://user-images.githubusercontent.com/31929183/150643493-b5613888-9909-4611-a776-734c1d7c5d9c.mp4
Note that these two files are not the same but is not recognized by VLC or YouTube as 360°.
https://youtu.be/7tvdkANBJHQ

Using the original with Google's Spatial Media Metadata Injector:
https://user-images.githubusercontent.com/31929183/150643511-770663ed-cc47-4999-b101-c231fea67188.mp4
This version works in VLC as well as YouTube as 360°.
https://youtu.be/vhUDzS9_oVw

I cannot reproduce this. Metadata injection seems to work fine for 360 and ODS videos I render and vlc recognizes them:

It doesn't recognize your video though, so this might be a Windows-only thing. Marius was using OSX when implementing it, so it might have just never worked on Windows in the first place, not sure though cause I've got no way to reproduce (I tried setting my file encoding to that which Windows uses by that didn't break it either).

i tried it doesnt work

Caused by: java.lang.ClassNotFoundException: com.coremedia.iso.boxes.FileTypeBox

yeah doesnt work for me too

Follow these instructions:
https://support.google.com/youtube/answer/6178631?hl=en

VLC is a good media player to test this, don't rely on Windows' own Movies.
Alternatively, upload to YouTube and see if it renders as 360°