mplayer
Cross-platform multimedia player.
TLDR
Play the specified file or URL
$ mplayer [path/to/file|url]
Play multiple files
$ mplayer [path/to/file1 path/to/file2 ...]
Play a specific file repeatedly
$ mplayer -loop [0] [path/to/file]
Pause playback
$ <Space>
Quit mplayer
$ <Esc>
Seek backward or forward 10 seconds
$ [Left|Right]