Load and show YouTube playlists in the sidebar on hover
The YouTube Sidebar Playlists Loader script adds a custom "My Playlists" link to the YouTube sidebar. When hovered over, a submenu is displayed, showing all playlists from the user's account. The playlists are fetched automatically upon page load, and users can navigate directly to any playlist by clicking on its name.
GM_xmlhttpRequest API to make cross-domain requests, allowing it to fetch playlist data directly from YouTube's feed.const, let, arrow functions, optional chaining, and template literals.