Add support for YouTube playlists.

[moonstar-x]

⚡ Describe the New Feature

Add support for YouTube playlists with URLs specified in the queue.txt file.

[salocinyeet]

Basically extracting all the url out of the playlist and putting them in.

[l0rdsami]

Maybe try implementing the Youtube API, you get I think 10k free requests per day. You just have to explain how to get an API token (they are free).
I'm currently writing some own things into the bot, and am already using the API via an npm package called "youtube-api", it works really well.

[moonstar-x]

Thanks for that suggestion, I thought that using the YouTube API directly was not free. I'm gonna look a bit into it, thanks!

[l0rdsami]

https://developers.google.com/youtube/v3/docs/playlists/list
the documentation on the required API call

[moonstar-x]

Ah I see, I thought you meant that we could play the youtube stream from the youtube API... Lol my bad :/