I was in your situation once, and I believe I understand your problem.

If you go to www.steeemd.com/@thedesertartist you can see how much bandwidth is on your Steemit account. You need bandwidth to perform all actions on Steemit, from following someone to uploading a video.

Your bandwidth seems okay now because it looks like you haven't been too active in 24 hours. When you do not have enough bandwidth and try to upload to d.tube you will get the same error message. In any event, I have delegated to you 50 SP of my own money, this will give your account more bandwidth to operate.

I recommend you try to upload now as you normally would, see if it works.

No need to thank me, you already make art : )