This 7-digit number is the product’s SKU or catalog number within FC2’s database. It is the most critical part of the identifier because it points to a single, specific video release. Changing any digit would reference a completely different piece of content. For archivists, this number is the master key for locating supplementary data such as the original upload date, duration, file size, and creator information.
Accessing a 1080p or 4K "Update" to an older file. FC2-PPV-3966770.mp4 UPD