DTube now sucks so much less than it used to, if you have no backups of your content then the content is gone. DTube and blockchain technology is still being marketed as something that can host content that you are in control of if you know how to use IPFS and take control of your content. But at the end of the day I would never trust any external source to store my content, I don't trust YouTube either, so I always back everything up on external hard-drives.