diff --git a/scripts/barrier_picker_app/static/index.html b/scripts/barrier_picker_app/static/index.html
index f2e5bdc..fe229a7 100644
--- a/scripts/barrier_picker_app/static/index.html
+++ b/scripts/barrier_picker_app/static/index.html
@@ -461,7 +461,10 @@
       loadCursor();
     });
 
-    // Keyboard shortcuts
+    // Keyboard shortcuts.
+    // Reason: register on the *capture* phase so we run before the native
+    // <video> element's built-in handlers, which otherwise also seek by
+    // their own amount and double the actual jump.
     document.addEventListener('keydown', (e) => {
       if (e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA') return;
       // Don't react to picker shortcuts while either modal is open.
@@ -488,7 +491,13 @@
         case 's': stop(); submit('skip'); break;
         case 'u': stop(); submit('unusable'); break;
       }
-    });
+    }, true);  // capture phase — beats the native <video> keyboard handler
+
+    // After clicking the seekbar (or anywhere on the video), the player
+    // keeps keyboard focus and intercepts our arrow-key shortcuts. Blur it
+    // on mouseup so subsequent arrow presses go to our document-level
+    // handler unambiguously.
+    player.addEventListener('mouseup', () => player.blur());
 
     // Welcome modal — show first time, dismissable; ? button reopens it.
     const modalBackdrop = document.getElementById('modal-backdrop');