Worked on the videolan/vlc repository to address video playback stability during complex UI interactions on iOS. Focused on a targeted bug fix, the developer updated the video rendering loop in Objective-C to use kCFRunLoopCommonMode, ensuring continuous frame updates even when users interacted with UI elements like the control center. This change prevented video freezes while maintaining synchronized audio and video playback, closely aligning behavior with Apple’s AVPlayer. The work demonstrated proficiency in iOS development, video processing, and run loop management, resulting in improved playback reliability and a smoother user experience in UI-rich scenarios without introducing new features.