Because titles are often in Japanese, Western viewers rely on the production code (SSIS-211) to find specific works.
These are time-stamps or unique database IDs used by servers to prevent duplicate file entries. SSIS-211-EN-JAVHD-TODAY-1109202102-55-18 Min Free
This refers to the resolution or the specific distribution platform, indicating the video is in High Definition. Because titles are often in Japanese, Western viewers