: This is a standard digital multimedia container format most commonly used to store video and audio.
If you received a text message or email unexpectedly with a link to "Download File 162 (1).mp4," . Download File 162 (1).mp4
: While simply downloading a file is often safe, running it—especially if it is an executable disguised as an MP4—can infect your device with malware or arbitrary code. : This is a standard digital multimedia container
