Apps often rename your videos to these strings when you save them to your camera roll.
At its core, this is a file, which is a video container format originally developed by Apple for the QuickTime Player . The long prefix (the "dcb211..." part) is likely a cryptographic hash —a unique digital fingerprint used by developers to: 8604013-dcb211ce34448acc6017969e709b650a.mov
Helps large platforms (like Discord, Slack, or CMS tools) organize millions of uploads. Why is it on my device? Apps often rename your videos to these strings