If it would be easier for you, don't forget that you can produce captions, which can be baked into a youtube encode as annotations and all the downloadable annotations as soft subtitles - so if it feels like you're 'infodumping' too hard by just copying all your notes, you can indicate neat things as it happens, and the fact that you can only have one subtitle at once, it can't fill the screen with information and can't change too quickly will naturally mean that you can't go overboard.
As for the submission notes themselves, the most important things to include (for me) are:
-All glitches and techniques used.
-Common forms of going the fastest, their input and where they apply.
-Things you DIDN'T do (in terms of techniques or routes that barely didn't work) that could potentially be included in future submissions.
https://support.google.com/youtube/answer/2734698?hl=en