The YouTube Timeline Extension is a free Chrome extension developed by cherubably. It enhances the functionality of YouTube videos by allowing users to add timelines and navigate to specific points in the video with ease.

With this extension, users can set timelines to specific positions in a YouTube video using the keyboard shortcut Alt + Shift + Number. This feature enables precise positioning and makes it convenient to jump to desired sections of the video. Timeline markers are displayed on the video's progress bar, providing a visual representation of where timelines have been set.

The extension also offers shortcuts to quickly navigate to previously set timelines using Alt + Number. This allows users to seamlessly move between different sections of the video without the need for manual scrolling or seeking.

Installation of the YouTube Timeline Extension is simple, as it can be added to Chrome as an extension. Once installed, users can play a YouTube video and utilize the keyboard shortcuts to set and jump to timelines. The timeline list is maintained independently for each video, ensuring that users can set timelines for different videos without any confusion.

Overall, the YouTube Timeline Extension aims to enhance the efficiency of navigating YouTube videos and provide quick access to specific points of interest. It is a useful tool for users who frequently watch and explore videos on the platform.