A text version is way more time consuming for the author. Some people do these videos for free with no ads or sponsorship, they do it only to help others, you cannot shit on them only because it's not your preferred media.
And for walkthrough I honestly think it's often the best format. It's easier to understand what you should do when you see it and it's also easier to find what you're searching for when you see it. When you have to ctrl+f a bunch of synonyms because you don't know which words the author of the walkthrough used to describe the scene it's time consuming. Looking at 1 or 2 seconds of gameplay every half hours is less annoying, at least for me.
I never played it but wasn't the game still a buggy mess weeks, if not months after release?