It made sense, but now it is back to unknown error on final upload. That is stupid: at least give an error code

Hello medicinaluse, You might be interested in the Vortex derivation of true universal notes in my essay at: "The Secret Enneagram of Gurdjieff modified by Universal Vortex Math"

I used Handbrake, but I did it at a higher fast 1080p30 (the default) It loaded fine, but did not play. One needs to realize that Dtube is still in the dark ages of 480, once you choose that it works fine.