This is really really REALLY great. I use youtube-dl and FFMPEG on my desktop a LOT. I have always wanted an app just like this. I immediately paid to remove ads.
Do you think you could give it "Share" functionality, so you can Share a link to PowerTube from another app? For example: on reddit, most videos are DASH (very annoying). If I am in the Reddit app and see a video, I click Share, PowerTube is one of the options, and it will send the URL directly to PowerTube, which will then download it?
Just an idea. Loooooove this app. So excited.