Dtube
its a platform which allows people to post videos and watch videos and basically its dtube is written in javascript and how you will earn on dtube is similar to steemit people will upvote you if they like your video and you will be paid according to that . Dtube is decentralized platform it is powered by Steemit. and the videos you post on dtube can be seen on steemit on your account . Dtube videos didn't have advertisement to earn. It has a blockchain who will provide it.
Youtube
As we all know about youtube because its the most famous website where billion of people are watching videos and people earn millions from it how do they earn is really different from dtube because youtube pay us through advertisements and its a platform where anyone can post videos.
Comparison
as we know that YOUTUBE need alot views to start earning money on y0utube but on the other side on dtube we can earn the smallest number of upvotes from which we can earn more and more and its much eaiser to do that on dtube for me dtube is much easier then youtube to start earning money