Vibio is live. It is a free music and video app: search for a song or a video, play it, or keep a copy on your device and listen to it with no connection at all.
Download quality
Audio saves as MP3 at up to 320 kbps, and video at up to 4K. You choose the quality at the point of download rather than being given one.
The library is yours
Everything you save is stored on your own device. There is no account to create and nothing to sign in to, which also means there is no library of yours sitting on a server somewhere, and no subscription.
Organising it
Folders, playlists and channels. You can arrange what you keep however suits you, and browse everything by the channel it came from.
Where to get it
Vibio runs in the browser as an installable web app, and there is an Android build on Google Play.