4somemp4 -

This usually means a missing codec. Updating your media player to the latest version usually solves this.

If you are creating or managing a collection of these files, clarity is key: 4somemp4

Ensure the file isn't actually a "double extension" (e.g., 4somemp4.mp4.exe ), which is a common tactic for hiding executable viruses. This usually means a missing codec

If you have a legitimate file, use a versatile media player to ensure all codecs are supported: 4somemp4