The 哈佛線上補課平台外掛 is a Chrome add-on designed to improve the online video viewing experience. This free tool allows users to automatically set playback speeds, fast forward, rewind, and pause videos seamlessly. It is especially useful for those who frequently engage with educational content on the Harvard online platform, providing a more efficient way to manage video playback.

Key features include the ability to adjust video time using keyboard shortcuts, automatically preset video speeds, and eliminate the need to wait for point deduction prompts. Users can directly enter full-screen mode with a single click, as the program automatically handles point deductions. This add-on significantly enhances user convenience and control over video playback settings.