DTube is linked to your steemit account so you have a higher change of getting more upvotes, an upvote on the dtube site is the same as someone upvoting on steemit.
Yea there are a few teething problems with dtube but these are being ironed out and the platform is getting better.
Videos are slow sometimes as the blockchain as a whole can slow, also videos currently are only kept for 7 days and then deleted unless they are popular. Still a better change to get more upvotes.