Glide
Glide is a free and open source, simple and minimalistic media player
RecApp
RecApp is a free and open source, simple and user friendly app for recording desktop for Linux
Haruna
Haruna is a simple and customizable video player with the ability to play videos from YouTube and PeerTube. A free and open source program
traGtor
traGtor – free and open source audio and video file converter, GUI for FFmpeg
FreetuxTV
FreetuxTV – free and open source application for viewing and recording TV channels, listening to radio for Linux
Ace Stream
Ace Stream is a peer-to-peer multimedia streaming protocol, built using BitTorrent technology
FreeTube
FreeTube is a free and open source, multi-platform, privacy-focused YouTube desktop client
Audacious
Audacious is a free and open source, multi-platform, simple, lightweight and advanced music player
DeaDBeeF
DeaDBeeF is a free and open source, multiple-platform modern, simple and minimalist modular audio player
Nuclear
Nuclear is a free and open source, multi-platform modern music player focused on streaming from free sources