Is this better than just watching YouTube tutorials?
It's different, not strictly better. YouTube tutorials are excellent for learning specific techniques at your own pace — the GPT can't show you a screen recording of exactly where a button is. Where the GPT wins is interactivity: you describe what you're trying to accomplish with your specific footage, and it gives you step-by-step instructions tailored to your project rather than a generic demonstration. Think of it as a tutor sitting next to you at your edit bay, not a course you follow along with.