These files are cache files. If you delete them, your device will simply regenerate them the next time you browse your folders. Deleting them is a common way to clear up "Other" or "System" storage space on mobile devices.
: Programs like Premiere Pro or DaVinci Resolve create "peak files" or "thumbnail caches" with similar alphanumeric strings to manage project assets.
: If you found this after running data recovery software, it represents a recovered preview image rather than the full video file. Is it safe to delete?
: Many Android devices and apps (like WhatsApp or Telegram) generate these files in hidden folders (e.g., .thumbnails ) to speed up gallery scrolling.
: Short for "thumbnails." These are low-resolution preview images created so your device doesn't have to load the entire video file just to show a preview icon.
: Indicates the original source format of the video from which the thumbnail was extracted.