: The suffix _source often indicates that this is the original high-resolution version of a file before it was compressed for streaming. The random string ddgrinch5vg4a is likely a unique ID assigned by a server (common with sites like Discord or Twitter/X).

When you encounter a filename like this, it’s usually the result of a download from a social media platform or a temporary cache file. Here is how you can investigate its contents and origin safely.

: Video files often contain hidden "tags" that identify the software used to create them or the date they were filmed. You can use tools like ExifTool or check the "Properties" tab on Windows to see if there is an "origin" or "encoded by" field.

: If you can play the video, take a clear screenshot of a unique frame. Use a tool like Google Lens or the InVID verification plugin to search for that image online. This can often lead you back to the original TikTok, YouTube, or Reddit post.