Libraries and Downloads

Signing in

Your YouTube and Nebula sign-ins, from a browser or a private window.

A sign-in is needed for your Suggestions feed, age-restricted and members-only videos, Nebula, and when YouTube asks you to confirm you're not a bot. Set it up in Settings › Downloads.

YouTube

Sign In to YouTube… opens a private sign-in window. Nothing from it is kept except the YouTube sign-in itself.
Import from Browser copies your YouTube sign-in from a browser you're already signed in to: Safari, Chrome, Arc, Dia, Brave, Edge, Firefox, Helium and others, including specific profiles. Safari needs Full Disk Access; the app shows a button that opens that setting.
Sign Out forgets the saved YouTube sign-in.

Nebula

The Nebula section has its own Import from Browser and a field for a Nebula token. YouTube and Nebula sign-ins are stored separately; importing one never replaces the other.

Every sign-in is stored encrypted. See Privacy and security.