Twilio offers a comprehensive set of tools to enhance video applications throughout the entire video lifecycle, from preflight to postflight stages. These tools include Room Monitor for real-time monitoring and troubleshooting, Video Diagnostics App & SDK for user setup and network performance testing, Preflight API for ensuring correct participant setup, Network Quality API for displaying network quality scores, Video Insights for analytics and aggregations, getStats() for collecting real-time events and metrics, JavaScript Logger for capturing real-time logs. By leveraging these tools, developers can monitor quality, troubleshoot issues in real-time, and provide end-users with visibility into their network connectivity throughout the call. This enables better management of the video experience, from preflight to postflight stages, ultimately leading to a high-quality video application.