Synchronized Playback for YouTube Archived Live Streams

An extension that synchronizes playback of YouTube livestream archives.

CAUTION: This feature is still experimental, and usability and performance are subject to future improvement. Synchronizes playback positions across multiple archived YouTube Live videos. When watching collaboration streams where multiple live streamers broadcast from their own perspectives, this feature allows you to open multiple archive videos in separate windows and automatically align their playback positions, enabling synchronized viewing across all streams. Pressing the SYNC button synchronizes the seek positions of the videos. A gray button indicates that synchronization is disabled. Red and green buttons indicate that synchronization is enabled. The seek position of videos marked with a green button will align to the seek position of the video marked with the red button. The synchronized playback position is calculated based on the actual timestamp of the live broadcast. Note: The edited archive does not function correctly because the seek position cannot be calculated accurately.