diff --git a/src/content.ts b/src/content.ts
index ade26558..606d68af 100644
--- a/src/content.ts
+++ b/src/content.ts
@@ -824,7 +824,8 @@ function updatePreviewBar() {
         types.push("preview-" + sponsorTimesSubmitting[i].category);
     }
 
-    utils.wait(() => previewBar !== null).then((result) => previewBar.set(utils.getSegmentsFromSponsorTimes(allSponsorTimes), types, video.duration));
+    utils.wait(() => previewBar !== null && video !== null)
+        .then((result) => previewBar.set(utils.getSegmentsFromSponsorTimes(allSponsorTimes), types, video.duration));
 
     //update last video id
     lastPreviewBarUpdate = sponsorVideoID;