fix dead links in introduction

Please be fixed this time

src/components/marquee/Marquee.astro

@@ -76,6 +76,7 @@ const videos = [
   }
 
   function setActiveVideo(index: number) {
+    console.log("setActive", index);
     currentVideo?.pause();
 
     currentVideoIndex = index;
@@ -112,6 +113,7 @@ const videos = [
     observer.observe(video);
 
     video.addEventListener("ended", () => {
+      console.log("video ended", "duration", video.duration, "ctime", video.currentTime);
       // The "ended" event might just mean its buffering.
       if (video == currentVideo && video.duration !== 0 && video.currentTime === video.duration) {
         offsetCarousel(1);