Are you trying to or fix an error related to it?
To give you a more "useful" post, I need a little more context: 18778mp4
Security cameras or dashcams often name files with sequential numbers (e.g., 18778.mp4 ). ⚠️ Safety Tips for Mystery Files Are you trying to or fix an error related to it
Where did you (social media, a specific website, or your hard drive)? a specific website
Only open files from people or sites you trust .