: It was created using the Photos app on iOS. When a user selects "Save as New Clip" after trimming a video, Apple assigns a random alphanumeric string (like D79F97BA... ) to prevent overwriting the original.
: If someone sent you a video they just edited on their phone, this is the default name it carries. trim.D79F97BA-9376-4B3E-B0B1-E2B52AFE15B3.MOV
: If you recently backed up your iPhone to a PC or Google Photos, your trimmed clips will appear with these long, complex filenames. : It was created using the Photos app on iOS