Mp4 | Vid01 (3)

: Change your folder view to "Large Icons" to see a preview frame of the video.

: This is a common default prefix used by various recording devices (like dashcams or older digital cameras) to signify "Video 01." Vid01 (3) mp4

Since the name itself doesn't describe the content, it likely originated from one of the following: : Change your folder view to "Large Icons"

To find out what is actually in the video without a descriptive title: resulting in multiple copies.

: You may have clicked a "Download" button on a website three or four times, resulting in multiple copies.