How can I playback audio from 3rd party sites?

You can install youtube-dl to playback URLs from every source youtube-dl supports. However, there will be no support for youtube-dl related issues.

Some websites don't allow downloading, so make sure you don't use the bot for those sites.

How does Text-to-Speech (TTS) work? I need an URL for that!

Search the forums for some URLs you can use with the bot. Also, see this page for more information.

Can I download whole playlists from YouTube?

Yes, you can. This requires installing youtube-dl. When creating a new playlist, you have the option to enter a URL from which the playlist will be fetched.

I want to integrate the bot into my website / remote control the bot via script. How can I do that?

The API documentation of the Bot can be found here. Samples and libraries can be found in the 3rd party forums.

How can guests control the bot?

You can bind a bot user to a server group for that (for example: your default guest group) and set the privileges you want the guests to have. The web-interface will however always require a login.