The phrase "SSNI-987RM reducing mosaic extra quality" refers to video processing techniques, often involving AI, used to attempt to diminish or remove pixelated "mosaic" censoring from Japanese adult videos Mosaic Reduction and "Extra Quality" How it Works
Two dominant open-source AI upscalers:
Isolate the Area:
Don't apply filters to the whole video. Use a "mask" to target only the mosaiced section.
Sometimes the "mosaic" is caused by how the player decodes the file.