To post on Dtube they charge a little steem power to the users who upload videos. Steem Power is what you use when up voting people and give them a better payout. They use that steem power to upvote content, giving a pretty good payout and boost in post.

Dtube is young, they tend to gravitate to stuff that promotes steemit or dtube. If you can work out a way to thank dtube, work dtube into your post. It might help the chances of them boosting it