A walkthrough like that would look like and probably be used the same way as a UHS file... but not. Why not use the spoiler tag idea?

With a normal walkthrough, you'd most likely have to skim it and maybe accidentally read a huge spoiler and ruin the game.
I have an idea.

Why not have a walkthrough that tells the directions to solve puzzles, etc, in normal text, and have significant spoilers in spoiler tags? This should please everyone looking for a hint or spoiler.