Immensely Useful
This is a SOLID product that will level up just about ANY marketer. If you create content this will help you focus on what people are REALLY looking for. Even if you don't do video yourself, keep in mind that one of the first things people do before they spend money is to search for informational videos. So this will help you nail relative non-video content even if you do NOT do video yourself. And if video is part of your strategy, this is a no brainer.
I'll be using this for organic SEO purposes, but I also want to run targeted ads on other people's videos, so this is absolutely perfect.
I went for the full stack, because that also gets you access to the ads library, which is super useful for competitive intelligence.
I don't get especially excited by software apps, but as a marketer, this will light your creative (and money-making) fire. Do NOT sleep on this, or you WILL regret it.