There may be a few more things I have been doing as SOP for DTube; I aways make sure I have the title I want for the video as the title of the file: For example - white.mp4 is the title of the file and when I upload it DTube automatically inputs white as the title.
It might help to have the description typed on another app and then just copy it to the body. It's bizarre, but the less interaction with the DTube cloud while uploading the better.
I only input one tag, and then after snap is uploaded I hit submit and it works out okay so far.