The "MP4" in "MP4 Mobile Movies Guru" is crucial. This format has become the universal standard for mobile video for several key reasons:
The MP4 (MPEG-4 Part 14) format became the universal standard. It offered an exceptional balance between video quality and file size, and more importantly, it was natively supported by almost every mobile operating system, including Symbian, BlackBerry OS, early Android, and iOS. Mp4 Mobile Movies Guru