Just some thoughts; perhaps have the product for more than a few minutes before you review it? Especially considering you haven’t used an Amazon smart speaker before. Not to mention the rest of the video is you literally just taking guesses about the product and reading a manual. 👍🏻
the middle button is the privacy/do-not-disturb button.this disables the microphone and prevents others in your family plan to drop-in on your echo device.