YouTube My Timestamp is a free Chrome extension developed by motsu. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension allows you to add private notes to YouTube videos, including timestamps.

With YouTube My Timestamp, you can create small notes that only you can see on every YouTube movie page. These notes can be used to jot down any information or thoughts you have about a specific video. Additionally, when you write a timestamp in your note (e.g., 12:34), it automatically becomes a clickable link that takes you directly to that specific time in the video.

This extension provides a convenient way to keep track of important moments or interesting points in YouTube videos, allowing you to easily revisit them later. YouTube My Timestamp is a useful tool for anyone who wants to enhance their YouTube watching experience by adding personal notes and timestamps to videos.