: Tools like OBS or Loom can be configured to save files with a project number and a short hex code for versioning. How to Find the Feature

: Search your history for the string "90B15F6" or "New Project" to find the website where the video was created.

: Cloud editors like Clipchamp , Kapwing , or Adobe Express generate generic "New Project" filenames if a title isn't manually entered before downloading.

: Tools like Runway , Luma Dream Machine , or Pika Labs often use this naming convention when you "generate" a new video clip from a prompt.

The alphanumeric code [90B15F6] is typically a (hash) used by software to distinguish this specific export or "generate" task from others. Common Sources for This Type of File