SimpleScreenRecorder
SimpleScreenRecorder is a free and open source linux software for created to record (screencasting) programs and games
VokoscreenNG
VokoscreenNG – free and open source is an easy to use screencast software, creator to record educational videos, live recordings of browser, installation, video conferences, etc
Minitube
Minitube – a simple software for viewing videos from YouTube: just enter the search keyword and Minitube will output an endless video stream
Gnome Twitch
Gnome Twitch – free and open source software allows searching for and watching Twitch streams from the desktop for Linux
Stremio
Stremio – organize and watch videos, movies, TV series and TV channels from different services: Youtube, iTunes, Amazon, Netflix, Twitch and others
VLC
VLC – free and open source cross-platform powerful multimedia player which plays most multimedia formats
Elisa
Elisa is a simple and beautiful music player with online radio support. Free and open source program
Clementine
Clementine – multiplatform free and open source modern music player and library organizer