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Unfortunately, existing systems either keep their memory inside the model context or in a flat feature store, and organize it around frames rather than around the persistent entities a stream is really about, which confines them to bounded videos and weakens their ability to track who and what reappears over time. In this paper, we propose ReflectWorld-MM, an entity-oriented multi-media memory system for open-ended video streams. It consists of three parts. The first is a perception front-end that turns a streaming video into entity-resolved observations under a bounded short-term memory. 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