: This suggests that the video was ripped (captured and encoded) from a web streaming source. WebRips are often used for content that wasn't officially released in a downloadable format but was streamed online.
The specific file name "Japanese Mom 2 2017 WebRip 720p AAC x264-KOREANZ" refers to a high-definition digital copy of the film: Japanese Mom 2 2017 WebRip 720p AAC x264-KOREANZ