YouTube Synchronizer is a free Chrome extension developed by Artiu. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory. This extension allows users to synchronize YouTube videos in realtime across different devices.

With YouTube Synchronizer, users can enjoy their favorite songs or watch videos with their friends, even when they are not physically together. The extension provides a simple and easy-to-use interface. To use it, simply click on the extension to open the popup. Then, choose the tab you want to share in the "Create" tab. The extension will generate a code that can be sent to your friend. Your friend can then paste the code into their extension.

One important thing to note is that after joining the synchronization, users need to click somewhere on the YouTube website to start playing the video. This ensures that everyone is watching the video together.

With YouTube Synchronizer, you can now enjoy a synchronized YouTube experience with your friends, no matter where they are.