Thanks friend :0) If you want to make comments on the dtube platform you have to create a dtube account. If you don't want to that is fine, you can always just comment from steemit just the same. I know it is a bit confusing on how it all works but you will slowly figure it out ;) DApps (like @dtube) are a bit confusing when you first get to steemit but don't worry, you will figure it all out.. I see your new to steemit so I wanted to say welcome!! and feel free to hit me up if you ever have any questions. Take care.