: Many mobile devices or social media apps assign random alphanumeric strings (like "yhgjmyh") to video files during the export or download process.
: The "(2)" at the end suggests that a file with the exact same name already exists in your downloads or local folder, leading your operating system to rename the new copy to avoid a conflict. yhgjmyh (2).mp4
If you are looking for information regarding a specific video you found with this name, could you describe or where you saw it ? I can then help you identify the actual content or provide a write-up on the subject matter. : Many mobile devices or social media apps