From Verbatim to Gist: Distilling Pyramidal Multimodal Memory via Semantic Information Bottleneck for Long-Horizon Video Agents. - Niu Lian; Yuting Wang; Hanshu Yao; Jinpeng Wang 002; Bin Chen 011; Yaowei Wang 001; Min Zhang 005; Shu-Tao Xia (ACL (1), 2026)