Optical flow has long dominated motion representation in video by focusing on explicit pixel displacement caused by object or camera movement. In this work, we argue that video also contains a largely overlooked form of motion information, namely latent micro-motion, which arises from subtle, structure-constrained responses of rigid components to physical interaction with the environment. We study this phenomenon in UAV video, a physically grounded setting where onboard structures are continuously exposed to aerodynamic forces. Although such micro-motions are low in amplitude and are often treated as noise or residual vibration, we show that they form a consistent visual signal that becomes observable through structure-aware and temporally aggregated analysis, even when using simple segmentation and coarse motion descriptors. Through an exploratory analysis, we demonstrate that micro-motion patterns exhibit clear structure and respond systematically to changes in wind conditions, with particularly strong sensitivity to wind direction and weaker dependence on wind magnitude in the examined scenarios. These observations suggest that micro-motion constitutes a distinct regime of motion information in video, complementary to explicit displacement, and motivate a broader reconsideration of how motion is represented and exploited in physically grounded multimedia scenarios.