I just launched an app called BlogFox to easily convert Youtube videos to blog posts. It uses Claude Opus (plus lots of prompt engineering) to generate the post which I find generates a blog post that sounds much more like a human than GPT4 or other models I've tested.
You can also add writing samples and custom instructions to further tweak the output to match your voice.
You can try it out for free / no credit card or sign up. Would love any suggestions, criticism, or any feedback at all: https://blogfox.ai