Try redownloading the file or using a dedicated video repair tool .
If you are looking for a (e.g., a security clip, a lecture, or a meme) named "661.mp4", could you tell me where you found the name ? Knowing if it's from a security camera , a school syllabus , or a coding forum will help me find the exact content. 661.mp4
Right-click and select Open with > Windows Media Player or VLC . Mac: Use QuickTime Player or VLC for Mac . Try redownloading the file or using a dedicated