New features as of today, 2020-12-29!

- Synchronise session between devices or preserve it after clearing
  cookies. Find the option in the settings screen.
- Delete all your data. GDPR compliant bay bee.
- Record your watch history (stored on the server, off by default) and
  change videos you've watched to a more subtle appearance, and give
  you the option to hide them all in the subscriptions list.

I've been wanting to add these for a while, and now they're in. I hope
you enjoy!