One of the most interesting features of SMPlayer: it remembers the settings of all files you play. So you start to watch a movie but you have to leave. don't worry, when you open that movie again it will be resumed at the same point you left it, and with the same settings: audio track, subtitles, volume.
SMPlayer can also play videos from YouTube and other sites. Other features: Automatically find and download subtitles. Thumbnail generator. Many audio and video filters. Skins. Available in more than 30 languages.