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. Unfortunately, we have not found any specific information about such conversion, but there is no reason why it should not work. Simply double-clicking the file opens it. Videos recorded in somewhat old VRO format are still supported in some multimedia converters, as as such vro to mp4 conversion (export to MPEG-4) should be possible. 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.

Vro to mp4 converter online