Woa Jeremy! I’m impressed with your kindness and dedication to this. Thank you very much for taking the time to take a look and share that video.
It’s an interesting approach. I believe that what we have to achieve its:
1: scroll and when we have the image at 100vh then
2: get a blur version of it and
3: the text would overlay over it. Finally
4: the rest of the site keeps flowing.
The thing is that the overflow scroll triggers not at 100vh and depends of where the cursor is killing the overall desired effect:
It’s a tricky orchestra.