Yes, worked for me too.  I think I had logged in with my private password before.  Log out, get your private key and log back in again.

you are the king problem solved love you for posting i was really feeling bad  its was so easy keep it up man

Do not watch the technical support ..... guys, where are you?

Change of language and restart does not help me

I found a solution, I hope that it will help you! https://steemit.com/unknown/@barski/unknown-error-when-uploading-a-video-to-d-tube

I am having the same problem.

Logout and login again. It should work.

Yes I am having the same problem. Does anyone know anything about this?

I resolved this issue by logging into DTube with my Private Posting Key, rather than using SteemConnect.

same question.....

It's an easy fix!  I had the same problem.  I wasn't typing my Tags properly.  Make sure you use all lower case, and use the space bar, not a comma, in order to confirm tag.

This may help you guys...

https://steemit.com/dtube/@jsantos17/dtube-uknown-error-solved

I have the SAME problem!

I figured it out and it worked! The language is the problem. At first I tried to name the video in Bulgarian (this is Cyrillic) - again and again. Then I named it in English and it worked perfectly! 
Then I edited the video from the Red button and changed the name in Bulgarian again.
Here you can see the video: https://d.tube/v/kogitalnost.com/6xi8u52o

I keep my fingers crossed for you as well!

same

Now 2018/04/25 I tried multiple times a video (5 mins, 150MB) and it generates same error.
This replay is just for informing others

I cave. I've tried every single suggestion on this forum and the ones it links as well. Just going to embed my YT videos on my posts instead. Kinda hard to get people to use something if it fails to function.

## TLDR: Too many video uploads within 5mins. 

So I was running into this issue today. I started uploading videos and I had a bunch of videos I needed to upload. I don't know if my issue is exactly related to yours, but mine had to do with how many videos I was uploading in 5min intervals... and their error message needs to be altered to reflect that. 

When I started getting the error message I looked at the JavaScript console to see if it was outputting some useful error messages because ```unknown error``` is a ridiculous message. All I could see was an HTTP 500 error and CONNECTION_TIMED_OUT. So I looked at the network traffic, yeap... there's the error:
```
{"error":"server_error","error_description":"( now - auth.last_root_post ) > STEEM_MIN_ROOT_COMMENT_INTERVAL: You may only post once every 5 minutes."}
```

The backend server(s) are sending proper error messages, and the frontend isn't catching those error messages and displaying it for the user to see. Really simple fix on their part, just don't know why they aren't doing it. Hope that helps!

Same, been 4 weeks now, no support at all
I' m convinced they are prioritizing blockchain servers for high rep users

I constantly have upload problems - which browser do people find the most reliable? I've been using Firefox and Chrome on my Macbook. Open to suggestions to improve reliability - nothing more frustrating than spending 10 minutes to wait for the video to upload, enter the title, summary, tags etc and to get the dumb error message :-(

Thanks, that worked for me!

I'm using English to name my videos but still having problem.

Comma! Put comma on your tags! E.g. dtube, nice, tutorial

I'm going to give it a try!!

I hope that works - I'll try that because same here

I tried everything and couldnt upload and got Unkown error for like 100 times and then i ticked nsfw button and it go uploaded..

my video isnt nsfw and now i cant even edit it. i get Unknow error

This is not fair.

Yes same here!! I was only able to upload a single video and then I can't upload anything anymore!!

Same here, I can't upload my video since yesterday... It is very annoying

I still got the error message even though I have logged out and back in again.