I often met the problem that my iphone can’t understand the downloaded videos. I google on the internet and know that I need an [Only registered and activated users can see links. ] to convert video formats. After comparing several converters I decided to try Xlinksoft iphone video converter. To my surprise, it works pretty well and supports converting all videos to my iphone. That is just my experience, what I want to say is that if you have the same problem, you need select a good iphone video converter to enjoy your phone better.