Very good hunting @vidiq, this extension is very good to know all the details of your favorite youtubers. Below I will leave my personal opinion about this product.

Pros:

• The extension has a simple but very informative design, it also shows you hundreds of things that you can not see from the YouTube interface.
• Although it is a tool in which you have to pay to unlock all your options, it gives you a basic plan in which you can register for free to try it.
• It is also perfect for novice youtubers, since it shows endless data that helped others succeed, such as keywords, number of videos per day, etc.

Cons:

• Subscriptions for the Pro and Boost plans are extremely expensive.