Le forum musical is a Chrome add-on developed by Evarin. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This free program adds a "Play" button to posts on the forum dessiné that contain a YouTube video link. By clicking on the button, the video starts playing on the side of the page without leaving the forum.

One of the convenient features of Le forum musical is that the button is grayed out if the video is the same as the one in the previous post. This helps users easily identify if the video has changed. Additionally, if the starting timing of the video is different, a small circle with the symbol "Δt" is displayed.

With Le forum musical, users can seamlessly watch YouTube videos shared on the forum dessiné without the hassle of opening a new tab or leaving the forum page. It enhances the user experience by providing a convenient way to enjoy multimedia content within the forum environment.