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MP4 is basically the extension for the file format MPEG-4 Part 14, which is a common format of digital audio and video streams defined by MPEG standards. The difference is that MP4 is more complex, and can store extraneous data such as subtitles and still images.

However, one of the most sought after feature of MP4 videos is its ability to be streamed over the Internet, due to its high rate of compression without sacrificing image quality.

One of the primary uses of Mp4 these days is to use it to broadcast MP4 music videos all over the net. The small file size due to the compression inherent in the format, coupled with the fact the music videos generally clock in at 5 minutes max means that MP4 music videos can be watched in real time, without any loading times, by people with middling Internet connection speeds.

Aside from music videos, MP4 is also the format of choice for video tutorials, short films with subtitles, documentaries and other videos that need to be streamed while retaining a high amount of clarity and definition. MP4´s competitor – the FLV format – while smaller in overall file size, is not advisable for videos with text, since the result would either be too pixilated or blurry to be read.

MP4 videos are very popular nowadays but they should not be confused with the videos played by some inexpensive generic MP3 players that include video playback capability.

While these videos have mp4 extensions and are advertised as such, they are just AMVs, which are low both in quality and compression that they aren´t even in the same league as MP4.

MP4 is also the common format for portable devices such as your PSP or iPod. I recommend joining a paid MP4 download service if you want to download MP4 music videos. These MP4 download sites allow you to download unlimited MP4 movies and music videos for a one time fee.

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