If you use services like iCloud, Google Photos, or Dropbox , you may receive an automated email if someone (or you) shared a file. However, legitimate services usually include the name of the person sharing it.
The filename IMG_XXXX is the standard naming convention used by for photos and videos. IMG : Image/Media. 6213 : A sequential number assigned by the camera. Download IMG 6213 MOV
If you weren't expecting a video, look for these warning signs: If you use services like iCloud, Google Photos,
Hover your mouse over the "Download" button without clicking. If the URL looks like a string of random letters or doesn't match a known service (like dropbox.com or icloud.com ), it is a scam. IMG : Image/Media
Phishing emails often say "Your file will expire in 24 hours" to force a quick, unthinking click.