I decided to expand it to include both legal and pirated means.
WatchIT it is a "collective entertainment methodology" in which each user consumes movies from the network and at the same time shares movies with other users.
Need something to watch? We’re on it. Plex combines free movies & TV with the best free streaming services, so there’s always more to discover.
Media center supporting movies, series, YouTube, and smartTV casting via DLNA/Chromecast. Offers HD, subtitles, add-ons, with no registration needed. Notice of new episodes.
Free open-source media system alternative to proprietary options, supports Chromecast, 4K streaming, plugin extensions, with privacy focus.
Ad-free open-source YouTube frontend for Android enabling video and audio downloads, account sync, SponsorBlock support, playlists, gestures, comments, and dark mode.
Xtra for Twitch is a Twitch client focused on providing the best viewing and chatting experience on mobile devices:
Offers an alternative Android streaming front-end for major platforms, with ad-free playback, SponsorBlock, advanced filters, danmaku chats, and playlist downloads.
Fork of a lightweight streaming client adding SponsorBlock to skip sponsor segments and ReturnYouTubeDislike to display dislikes, with support for multiple platforms.
With Poke, be Anonymous watching epic videos, searching thingys on the interwebs and listening to music on poke - the free privacy front end!
Free streaming player sourcing music from YouTube, SoundCloud, Bandcamp, and more, with lyrics, downloading, radio mode, ad-skipping, and Last.fm scrobbling.
An open-source, ad-free front-end to YouTube offering video downloads, audio-only mode, and subscription management without JS or registration.
Lightweight and open-source app for YouTube, PeerTube, SoundCloud, and more. No Google Account needed, supports 4K and background audio streaming with downloads.
Command line program that's a 
youtube-dl fork that downloads videos from YouTube and over 1000 sites. The main focus of this project is adding new features and patches while also keeping up to date with the original project.
you can use plenty of other youtube downloaders like tartube
Experience YouTube ad-free on desktop with enhanced privacy. FreeTube prevents Google tracking and works seamlessly across Windows, Mac, and Linux.
Tartube is a GUI front-end for youtube-dl, partly based on 
Youtube-DLG and written in Python 3 / Gtk 3.
No comments so far, maybe you want to be first?
