Movgrab is a command-line movie downloader for sites like YouTube. It has no dependencies; everything that's needed should be there in the tar.gz package. Movgrab can connect through an HTTP proxy, can output the download to stdout for piping into another program, and can fork into the background to free up the console. When forked into the background, its progress can still be seen in a ps list.
dvd-slideshow makes a video slideshow with from a batch of pictures. The output can be in FLV, MP4, or DVD format. It consists of a set of scripts: dvd-slideshow reads a text file list of all the pictures you want in one slideshow and creates a movie with your audio tracks and specified timing. It supports effects such as fades, crops, and the Ken Burns effect. dvd-menu makes a top-level DVD menu with the output files from dvd-slideshow. dir2slideshow makes a dvd-slideshow input file from a directory of pictures. gallery2slideshow makes the input file from your Gallery album. The output is fed through dvdauthor to create DVDs.
SMPlayer is a complete media player for Windows and Linux. It uses MPlayer as a playback engine, which is capable of playing most video and audio formats (AVI, mkv, WMV, MP4, MPEG, etc.). It can also play and download YouTube videos. One of the most interesting features is that it remembers the settings of all files you play. So if you start to watch a movie but have to leave, when you open that movie again it will resume at the same point you left it, and with the same settings: audio track, subtitles, volume, etc.
tovid is a suite of command line utilities (and a graphical frontend) for creating video discs in DVD, VCD, SVCD, and KVCD/KDVD formats (PAL or NTSC). tovid supports a wide variety of input video formats, and can encode to several different output resolutions. Discs may be authored with hierarchical menus for navigation and playback.
Mjpeg tools is a suite of programs which support video capture, basic editing, playback, and compression to MPEG-1/2 of MJPEG video. The capture software allows MJPEG video streams in AVI, Quicktime, and movtar format to be produced using the Iomega Buz, Miro DC10+, Matrox Marvel, and similar hardware. The editing and playback tools are hardware independent, with support for hardware accelerated playback if present. The MPEG compression tools are based on MPEG Software Simulation Group's reference encoder with enhancements to provide far faster compression and significant quality improvements.
motion uses a video4linux device for detecting movement. It makes snapshots of the movement which can be converted to MPEG movies in realtime (or later for low CPU usage), making it usable as an observation or security system. It can take actions like sending out email and SMS messages when detecting motion.
GNU VCDImager is a program for making Video CD (and Super Video CD, a.k.a. SVCD) images out of MPEG movie files. The images it creates are ready to use with programs which understand BIN/CUE images, such as cdrdao. GNU VCDRip allows for reversing the process, ripping mpeg tracks from (Super) Video CDs.