I got 1 video up. But on my 2nd video I get this "unknown error" endlessly.

I am new to d-tube. I managed to get one video uploaded. But I'm struggling to upload my next video. The video is MP4 and it is 32 minutes long. I've followed the process exactly as described above and at the end I just get "ERROR Unkown Error". Can someone please help me? My snapshot is a .jpg file and my video is mp4. I have 1 video uploaded already and the first one uploaded fine. I'm stumped why I can't get the other one up. Can someone guide me?