May 2025 monthly summary for repository libsdl-org/aom. Key feature delivered: AV1 Encoder Warp Mode RD Cost Bias to Favor Lower Complexity Decoding. This feature biases the rate-distortion (RD) cost of warp mode in the AV1 encoder to favor lower-complexity decoding paths, aiming to improve runtime performance without compromising output quality. The bias is applied during inter mode evaluation, motion mode evaluation, and TX search for inter candidates, thereby steering decisions toward simpler decoding paths. Major bugs fixed: No explicit bug fixes recorded for this month in the provided data. Overall impact and accomplishments: Introduced a targeted encoding-path optimization that reduces decoding complexity and potentially speeds up decoding on resource-constrained devices, contributing to better performance and user experience. The change is git-traceable via a single commit and aligns with performance-oriented design goals for the AV1 encoder. Technologies/skills demonstrated: C/C++ code changes in the AV1 encoder, rate-distortion modeling, warp-mode decision logic, inter-mode evaluation, TX search optimization, performance-focused software engineering, and commit-scoped change management.