diff --git a/index.html b/index.html
index c906dce..53589b9 100644
--- a/index.html
+++ b/index.html
@@ -441,6 +441,17 @@
     const winStart = Math.max(0, Math.min(86400 - winSize, focus - winSize / 2));
     const sec = winStart + e.offsetX / timeline.clientWidth * winSize;
     focus = sec;
+    const systemEvent = systemHighlights.find(item => sec >= item.start && sec < item.end);
+    if (systemEvent) {
+      const eventClip = clips.find(clip => clip.start >= systemEvent.start);
+      if (eventClip) return playClip(eventClip, 0);
+    }
+    const savedHighlight = highlights.find(item => sec >= item.start && sec < item.end);
+    if (savedHighlight) {
+      const highlightClip = clips.find(clip => savedHighlight.start >= clip.start && savedHighlight.start < clip.start + clip.duration)
+        || clips.find(clip => clip.start >= savedHighlight.start);
+      if (highlightClip) return playClip(highlightClip, Math.max(0, savedHighlight.start - highlightClip.start));
+    }
     const clip = clips.find(c => sec >= c.start && sec < c.start + c.duration)
       || clips.find(c => c.start >= sec) || clips[clips.length - 1];
     if (clip) playClip(clip, Math.max(0, Math.min(clip.duration - .1, sec - clip.start)));