Many DVRs and security cameras name files sequentially based on a database ID or timestamp.
A filename like 19853.mp4 is often an automatically generated string. Common sources include: 19853mp4
Use a tool like Mediainfo or ExifTool to view the "Date Created" and "Encoded Library." This can tell you if it came from a specific camera (e.g., DJI or GoPro) or software like FFmpeg. Many DVRs and security cameras name files sequentially
Could you clarify or what you were doing when it appeared? This would help in providing more specific technical steps. FFmpeg: doc/filters.texi - Fossies Could you clarify or what you were doing when it appeared
Files saved from certain video platforms or through tools like yt-dlp may retain a numerical ID from the source URL.
Some professional software like Agisoft Metashape or Blender may struggle with specific MP4 codecs if they lack the necessary plugins.