You have some really great ideas for making it better. Although I don't produce or upload video content, I follow people who do. Dtube is a cool concept, but the main reason to post there instead if youtube is the potential for a dtube upvote. As a viewer, I'd much rather watch a youtube video right now, but the dtube experience could improve greatly if some of your suggestions were implemented.
I'd also like to see improvement on the video speed section. I normally watch videos at 1.25x (or even 1.5x speed if the speaker is talking slowly) and there's an error I encounter regularly where rather than changing the speed when you click on it, it just goes back out of the menu to change the speed. Then I have to try again and hope that I find the hidden sweet spot to actually get it to change the speed.