The mentioned video puts together a detailed analysis about the Ventilation and Perfusion Ratio and its Mismatch. The approach adopted provides a very comprehensive explanation regarding it and therefore this video is all what you need. Timeline 00:00 Introduction 01:22 Alveolar Ventilation Perfusion Ratio 04:30 Normal and Defected - Comparison 05:44 Clinical References and Discussion 10:40 Response to Hypoxia and Hypocapnia 15:00 Decreased Ventilation and Perfusion - Analysis 19:25 Closing Remarks