To be honest, the experience to me about convert video for Windows is to use
iTunes M4V video converter for Windows to convert iTunes movies from M4V to MP4 format. We know all iTunes videos are in M4V which DRM protected, making it impossible to be played on non-Apple devices. If you really want to enjoy these videos on Google play, Samsung smart TV, Chromecast, etc, you can try this tool to
remove DRM from iTunes and convert videos with all audio tracks, subtitles at faster speed with lossless quality. After conversion, it will be much easier for you to enjoy all these videos on any devices freely.