FLV to MP4 Converter - Version 2.3 Tired of downloaded youtube videos not running on your computer? Now FLV to MP4 converter can convert your favorite youtube videos to standard MP4 videos that can be played by all media players. You can control the output file quality and thus size with a simple slider.This tool differs from others available online by its simplicity ,the user-friendly interface and last but not least batch conversion. Simply it gives you professional results with rookie controls.