# VideoLoop: Looped Working Memory Against Semantic Thrashing in Long-Form Video Agents > Source: > Published: 2026-09-30 03:30:08+00:00 Long-form video understanding requires multimodal agents to iteratively gather evidence over many reasoning steps. However, most existing agentic methods suffer from semantic thrashing: as append-only working memory grows, attention to key evidence collapses, and the agent loses access to what it ha