This video critically evaluates spec-driven development using GitHub's 'Specify' (Spec Kit) for AI-assisted app creation, comparing it to 'vibe coding'. The speaker demonstrates that while spec-driven approaches offer detailed planning, they are slow, costly in tokens, and yield inferior results compared to rapid, iterative vibe coding. A hybrid methodology is proposed, emphasizing an initial research phase with conversational AI, pre-setting the tech stack, designing with dummy data, building MVPs, and using lightweight, incremental specifications to achieve efficient and high-quality AI-powered app development.