In addition to what abuyeti says, Youtube is owned by Google for some time now and they operated it at a loss year after year in order to keep the huge marketshare and mindshare Youtube has over online viewers of content. There is no silver bullet for marketing online in a way that generates profits that any reasonable business can operate off of, and many other app-type of services operate at losses because they are funded by investors who hope that the gamble that sinking more money into such businesses will pay off when they can either flip it to another set of investors or IPO it. I know many content upload or streaming sites have failed in the past and the few successful ones seem to get bought out. Decentralization takes some leverage away from the big players like Google (Youtube) and Amazon (Twitch) and back in the hands of the users and producers.
I found this link explaining what dtube was (not sure if it's all still applicable as this was the release post)
It's open-source and appears to be made by someone who actually cares about users, which is arguably a much different approach than most of the big dogs.