DetailedTime is a free Chrome add-on developed by 塗田一帆. It falls under the Browsers category, specifically Add-ons & Tools. This add-on allows users to view the upload time of YouTube videos.

To use DetailedTime, simply click on the word "詳細" (Detailed) next to the video title. This will display the upload time of the video.

It is important to note that for live streams, the displayed time will be the start time of the stream. Additionally, the add-on may not function perfectly in all cases, so users should exercise caution and use it at their own risk. In some cases, if the browser window is too narrow or if the video title is too long, the word "詳細" may not appear.

DetailedTime also offers other features and self-made extensions for YouTube, which can be found on their website.

Please note that if you encounter any issues with the add-on, you can contact the developer on Twitter (@nulltypo), but they may not be able to respond to reviews.

It is important to understand that the developer is not responsible for any losses or damages that may occur as a result of using this Chrome extension. Users should use it at their own discretion.