Playlist download

[CarterSnich]

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.

What feature do you want?

Allow NewPipe to download playlists, or at least add option to download video when you tap-and-hold a video.

Sample playlist

Video options

Why do you want this feature?

It's more convenient to download a playlists that way, instead of playing each video and clicking the Download button.

Thanks!

[SameenAhnaf]

Duplicate of #1236.