Downloading a playlist in a single press, similar to download individual videos

[alik604]

Checklist

• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one feature request. I will open one issue for every feature I want to request.

Describe the feature you want

I think it would be nice if you add downloading a whole playlist in one go. This is a convenient feature for those of us who transferred music playlists from Spotify/Tidal to Youtube, and want to avoid having a PC as the middle man.

Optionally, the downloaded playlist could potentially be used as a cache for offline listening in-app.

Is your feature request related to a problem? Please describe it

I'm too lazy to download ~200 songs by hand... and also too lazy to download it as a playlist with youtube-dl & plug my phone into my PC.

This feature seems like a quick win:
1.. Add a menu item on the playlist view (under 'settings' and 'open in browser').
2.. Download the playlist and place it into a local folder of that name. I assume you guys use youtube-dl in the backend

Additional context

How will you/everyone benefit from this feature?

This feature will help us replace paid streaming services

---

For donating, which is preferable for you guys, liberapay or bountysource?

I'm thankful for the download feature already available :)

[triallax]

Duplicate of #5782.

For donating, which is preferable for you guys, liberapay or bountysource?

Bountysource is great if you want to put a bounty on a specific issue, while Liberapay is for recurring donations.

Thanks!

[alik604]

@TiA4f8R hey, in what way did i ignore template instructions?

[triallax]

They probably meant that it's a duplicate.

@TiA4f8R we should probably be more specific with this usage of the label. I'm creating a "duplicate" label, which I think should be used in cases like this.