If you found this file on your own hardware (camera or phone), it is perfectly safe. However, if you received it as an attachment from an unknown sender, Hackers sometimes use common-looking filenames to disguise malware. You can scan the file for free at VirusTotal before opening. 5. Troubleshooting: File is Corrupt
Often indicates the folder number (e.g., DCIM/100MEDIA). 1000146 mp4
Older DVR systems often export clips with these numeric titles. If you found this file on your own
Usually means this was the 146th video recorded by that device. 2. Common Sources it is perfectly safe. However