Quick add to playlist share action like for downloading videos

[Bnyro]

Describe your suggested feature

Currently, in order to save a YouTube video you opened in the browser (e.g. via Piped), you need to first share / open that video with LibreTube and then save it to a playlist.

It may be more convenient to be able to do this directly with a share action displayed in Android's share dialog (as for downloads).

Other details

No response

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