A very simple screen recorder.
Flowblade
Flowblade is a multitrack non-linear video editor for Linux released under GPL 3 license.
Vokoscreen
vokoscreen is an easy to use screencast creator to record educational videos, live recordings of browser, installation, videoconferences, etc.
Blender
Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline—modeling, rigging, animation, simulation, rendering, compositing and motion tracking, video editing and 2D animation pipeline.
Celluloid
Celluloid (formerly GNOME MPV) is a simple GTK+ frontend for mpv.
GUV
This project aims at providing a simple interface for capturing and viewing video from v4l2 devices, with a special emphasis for the linux uvc driver.
Cheese
A very simple webcam application.
OBS Studio
Free and open source software for video recording and live streaming.
VLC
VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files
SMplayer
SMPlayer is a free media player with built-in codecs that can play virtually all video and audio formats.