Update index.html

index.html

@@ -721,7 +721,7 @@
     // プログレスバーのイベントリスナーを更新
     progressContainer.addEventListener("mousemove", (e) => {
       if (!video.duration) return;
-
+      const previewVideo = document.getElementById("previewVideo");
       const rect = progressContainer.getBoundingClientRect();
       const pos = (e.clientX - rect.left) / rect.width;
       const time = pos * video.duration;