YouTube's average video buffering time has increased by 10%. How would you address this issue?

Focus on identifying the root causes of the increased buffering time by considering factors such as network conditions, server performance, and video encoding quality. Discuss potential metrics to track, like user engagement and churn rates, to understand the impact of buffering on user experience. Propose specific solutions, such as optimizing video delivery through CDN improvements, adjusting streaming quality based on user bandwidth, or enhancing the app's caching mechanisms. Finally, outline how you would measure the effectiveness of your solutions and iterate based on user feedback and data analysis.