The 'nokiavideoformatversion4' is not a standard, widely recognized file extension but rather a descriptor or internal designation related to video files used by older Nokia devices, particularly those running Symbian or early versions of their proprietary operating systems. These formats were often proprietary containers or specific configurations of common codecs like MPEG-4 or H.263, tailored for the limited processing power and screen resolutions of feature phones and early smartphones. Files associated with this designation typically contained video content optimized for mobile playback, often with specific bitrates, frame rates, and resolutions that maximized compatibility with the target Nokia hardware. While the underlying video data might be encapsulated in a container like MP4 or 3GP, the 'version 4' tag suggests a specific metadata structure or header format unique to Nokia's multimedia framework at that time. Users encountering this designation usually need to convert the file to a more universally compatible format (like standard MP4 or AVI) to play it on modern devices or software, as native support for this specific version identifier is virtually nonexistent today.