: Programs like Premiere Pro or DaVinci Resolve create "peak files" or "thumbnail caches" with similar alphanumeric strings to manage project assets.
The string appears to be a specific filename or metadata tag associated with a temporary thumbnail file, likely generated by a media player or file manager. Technical Breakdown 40489A9A Mp4 Thumbs jpg
: 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. : Programs like Premiere Pro or DaVinci Resolve