Hey Welcome to DTube and steem!! Thanks for your quick reply on YouTube :)
I hope you will have a great journey here and find new interesting friends!
I would suggest you to make a DTube only introduction video of you and your channel. That would proof that it is you also to other users and the official DTube account!
Peace!
P.S. if you have any questions, just ask or tag my name with @tibfox anywhere in a comment or post. Have fun!