Why do we see "unknown error" sometimes when we upload video to d.tube?
-Nobody answered about this so we can not say what exactly the issue. Sometimes it happens with all the videos you upload and sometimes it happens with few videos.
When it happens
But there is a solution to this. I am sharing how I got this solved.
Mostly it happens when you have similar keywords added to the video. When your first video got uploaded perfectly, and then you choose more video to upload with the same keywords the error message appears "unknown error".
Solution
Do this without any keyword and the problem is solved. If it won't work then we can only wait by the team to solve this or tell us what we should do.