Ok, so I'm looking at a website that tells me it's decentralized. But from all I can tell this is just a good old website. Somebody has control over the domain name. Points it to servers of his choice. And the servers deliver content of his choice. What's decentralized about it?
1. the content text and meta data is on the STEEM blockchain 2. Dtube is storing the videos etc on IPFS
so by reading the STEEM blockchain, we can get the content even without DTUBE.
Dtube is an app, just another one to talk to the STEEM blockchain and they make revenue by taking a small part of the revenue from the content creators.