Dtube held videos for 3 months. We've currently expanded our storage infrastructure and videos will remain online for 1 year. We aim to extend this before the 1 year marker is met so as to avoid videos being removed.
You can also use third party services or self-host your own videos which means DTube has no control over when or if they get deleted.
We understand the 3 month issue was a big turn off for many users and it really was an unavoidable issue that arose due to a lack of funding.
hopefully you can understand our predicament and appreciate the steps we've taken to resolve it.
We're committed to holding users videos for as long as possible.