I am not trying to be difficult. But if you are to succeed on steem it might help you to understand that people who post other people's content as their own are not generally rewarded with upvotes. So, if it is you in the video you need to make it very clear.

No, Dtube don't have restrictions on what you upload. However, they are very clear in their about page:

Because of the decentralized nature of IPFS and the STEEM blockchain, D.Tube is not able to censor videos, nor enforce guidelines. Only the users can censor it, through the power of their upvotes and downvotes.

Therefore we, the users, determine what is acceptable or not. What is worth rewarding or not.

I (and most other steem users) are not prepared to upvote posts that have content that does not belong to the person who posted it.

If it has been downloaded, or taken, without written consent or permission of the owner, you are free to post it on dtube.

But I am free not to upvote it as I don't see why people who didn't make the content themselves should be paid for it.

A trusted user claims you downloaded the videos from youtube and posted it on dtube as your own. If that is the case I can not support it.

If that is not true tell me.

Did you record the video? Is it you in the video.

If so you should make it clear in each of your posts. Tell us a bit about you. Tell us how you recorded the video. Why did you choose a certain location? Why a certain song?

Try recording an introduction dtube video where you tell us who you are (your steem name) and a bit about yourself. How did you get into dancing? Where are you from? What are your goals? Introduction posts are usually quite well rewarded.