This seems like a great lesson on not giving up on something that you don't nail down right away. Keeping the concept in your back pocket where you can pull it out and mold it every time your vision for the story gets clearer takes time but pays off once you have it.
Documenting the process with videos is a good tool for both accountability and understanding how this applies to actually writing the thing too. You'll probably hit those same kinds of roadblocks where something isn't working or just feels off as your draft progresses, but letting yourself reimagine those things as you go will drive it closer to what you want, bit by bit.
I'm excited for you in this journey -- it won't all be smooth sailing and you will be tested, but the patience and passion you've shown can take you to amazing places.