AVI is the audio-video interleave is a container introduced by Microsoft. Motion JPEG is a type of AVI compression, used mostly by digital cameras. While most downloaded AVI, which is ubiquitous for standard definition video content on the Internet, are encoded with XviD/Divx codec and there's no indication Apple is supporting such AVI.it won't let you play downloaded AVI movies on the iPhone 4.so you need to use this isksoft video converter for mac to convert to be iphone supported format.
It was the Apple iPad that started the revolution of enterprise mobility. Once this tablet made it into the market, other similar tablets hit the marketplace with different operation systems.