Some of those formats usually require that you use Windows Media Player or another specific program to play those files.

You can use it with AVI, WMV, MP4, MPEG, DIVX, FLV, SWF, RM and WMV formats. Though this is a free app, it covers a number of different formats and extension types. With Freemore AVI/WMV/MP4/MPEG/DIVX Converter, you can now change the format, convert and save any file quickly.

Changing the format to make that file accessible is a pain and something that can take way more time than you would like. The only problem is that you might come across files that are the wrong format for viewing and listening to on your device. When you find a video that you love online, you can bookmark that page and return each time that you want to watch it, or you can save yourself some time and download and save a copy of that video on your computer. To resolve this issue, try VLC media player.Freemore AVI/WMV/MP4/MPEG/DIVX Converter is a small app that lets you convert audio and video files into different formats for watching and listening to on your computer and other devices and for sharing with others. MP4 is a container that contains various kinds of data, so when there is a problem opening the file, it usually means that data in the container (an audio or video codec) is not compatible with the device’s OS.

On some devices, particularly mobile, opening this file type can be problematic. On Windows, it opens in Windows Media Player. There is no need for third-party software. Simply double-clicking the file opens it. MP4 files open in the operating system's default video player. Many consider MP4 to be one of the best video formats available today. It is also a popular video format for streaming over the Internet, such as on YouTube. It is compatible with a wide range of devices and operating systems, using a codec to compress file size, resulting in a file that is easy to manage and store. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video.

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