

To resolve this issue, try VLC media player. 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. Choose your output format ( MP4, MP3, AVI, M4A etc. 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 supports all iOS devices and delivers 4K ultra HD, with subtitles. With this App, you can access videos, music, and ringtones as well. It is compatible with over 60 top sources. Instructions Copy and paste the video link that you want to convert. Softorino YouTube Converter 2 can not only convert YouTube to MP3 for iPhone, but also to MP4 for all iOS devices as well. 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. Our leading YouTube to MP3 Converter is also compatible with many other online video sites such as Vimeo, Dailymotion and Liveleak. MPEG-4 (MP4) is a container video format that can store multimedia data, usually audio and video.
