The validation of computational models for ultra-high strain rate material response and failure is critically important for developing materials and systems that operate in extreme environments. Hypervelocity impact (HVI) experimentation provides the ability to produce the ultra-high strain rate responses of interest. However, in-situ multi-dimensional diagnostics of fragmentation particles is extremely challenging at associated time and length scales. In this work, we discuss the application of MHz-rate videography to quantify the fragmentation characteristics of the debris clouds formed during HVIs. A two-stage light gas gun was used to subject ultra-high molecular weight polyethylene (UHMWPE) samples to HVIs ranging from 2–6.5 km/s. A high-speed camera captured the impact region and impact face and exit face particle ejections at 1 million frames per second or faster. The resulting two-dimensional videos were then used to develop digital particle tracking methods to estimate the size, velocity, trajectories, and spatial disintegration of individual fragments during the formation and evolution of the HVI debris cloud of UHMWPE impacts. These methods are providing validation data for computational models at the fragment scale. Also outlined are the ongoing efforts in extending the present results to three-dimensional (3D) particle field characterization using a laser holographic method as well as high-speed shockwave formation and shock-shock interaction imaging diagnostics around individual particles.