Xxmy7rgj93m6.mp4 -

Temporary names assigned during a download.

Sometimes a long or complex filename causes errors in specific apps. Try renaming it to something simple like video.mp4 . xxmy7rgj93m6.mp4

If it's a "Hybrid" MP4 from OBS, ensure you let the software finish "remuxing" before moving the file, as users on Reddit suggest this is necessary for compatibility with editing software like Final Cut Pro. Temporary names assigned during a download