It's cool to put camcorder video which records your daily life in iPhone 4S for watching. The iPhone 4S supports up to 1080p H.264 video playback. The formats originally supported by iPhone 4S includes MOV, MP4 and M4V. However, the most popular camcorder brands, like Canon, Panasonic, mostly store the recorded video in AVCHD and MXF in format, which means you are not able to directly watch them on iPhone 4S. Never mind, Foxreal Studio provides the best MXF Converter for Mac. Simply convert the recorded videos on your Macintosh and transfer them to iPhone 4S for playback.