diff --git a/movie_editor/frontend/player.js b/movie_editor/frontend/player.js
index a1021c54..cf586b17 100644
--- a/movie_editor/frontend/player.js
+++ b/movie_editor/frontend/player.js
@@ -181,6 +181,8 @@
   }
 
   function _play() {
+    // At (or past) the end of the timeline → loop the playhead back to the start.
+    if (_phSec >= (_totalSecCur || 0) - 0.05 || !_clipFrom(_phSec)) _phSec = 0;
     const clip = _clipFrom(_phSec);
     if (!clip) return;
     if (_phSec < clip.startSec) _phSec = clip.startSec;