Robustness Analysis of Frozen Video-JEPA Representations with Factorized Latent Dynamics on HMDB51

Joint-Embedding Predictive Architectures (JEPA) are a promising framework for self-supervised video representation learning, yet the behavior of auxiliary objectives in small-scale Video-JEPA training is not well characterized. We report a small-scale empirical study of 18 auxiliary objective variants for Video-JEPA across two pretraining regimes: single-dataset (UCF-101) and mixed-dataset (UCF-101 + Something-Something V2 + ImageNet-100). We evaluate frozen representations on three complementary benchmarks: Diving-48 (fine-grained motion), SomethingSomething V2 (temporal reasoning), and Image

Research goal: What is the impact of varying perturbation magnitudes on the robustness of frozen Video-JEPA representations with factorized latent dynamics compared to standard JEPA objectives on HMDB51?

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