NewPipe (f-droid version) 0.13.6 (Android 4.0.3+)

Improvements
Disable burgermenu icon animation #1486
undo delete of downloads #1472
Download option in share menu #1498
Added share option to long tap menu #1454
Minimize main player on exit #1354
Library version update and database backup fix #1510
ExoPlayer 2.8.2 Update #1392
Reworked the playback speed control dialog to support different step sizes for faster speed change.
Added a toggle to fast-forward during silences in playback speed control. This should be helpful for audiobooks and certain music genres, and can bring a true seamless experience (and can break a song with lots of silences =\).
Refactored media source resolution to allow passing metadata alongside media internally in the player, rather than doing so manually. Now we have a single source of metadata and is directly available when playback starts.
Fixed remote playlist metadata not updating when new metadata is available when playlist fragment is opened.
Various UI fixes: #1383, background player notification controls now always white, easier to shutdown popup player through flinging
Use new extractor with refactored architecture for multiservice
Fixes
Fix #1440 Broken Video Info Layout #1491
View history fix #1497
#1495, by updating the metadata (thumbnail, title and video count) as soon as the user access the playlist.
#1475, by registering a view in the database when the user starts a video on external player on detail fragment.
Fix creen timeout in case of popup mode. #1463 (Fixed #640)
Main video player fix #1509
[#1412] Fixed repeat mode causing player NPE when new intent is received while player activity is in background.
Fixed minimizing player to popup does not destroy player when popup permission is not granted.

This release does not have a Play Store Description, so we grabbed one from version 0.8.10:

NewPipe: A free lightweight Youtube frontend for Android.

Description

NewPipe does not use any Google framework libraries, or the YouTube API. It only parses the website in order to gain the information it needs. Therefore this app can be used on devices without Google Services installed. Also, you don't need a YouTube account to use NewPipe, and it's FLOSS.

Features

Search videos
Display general information about a video
Watch YouTube videos
Listen to YouTube videos (experimental)
Select the streaming player to watch the video with
Download videos
Download audio only * Open a video in Kodi
Show Next/Related videos
Search YouTube in a specific language
Watch age restricted material
Display general information about channels
Search channels
Coming Features

Orbot/Tor support
Bookmarks
View history
Search history
Subscribe to channels
Watch videos from a channel
Search/Watch Playlists
Queeing videos
... and many more
Multiservice support

Although NewPipe only supports YouTube at the moment, it's designed to support many more streaming services. The plan is, that NewPipe will get such support by the version 2.0.