diff --git a/recounting_dashboard.py b/recounting_dashboard.py
index 8462926..a8f7633 100644
--- a/recounting_dashboard.py
+++ b/recounting_dashboard.py
@@ -119,7 +119,7 @@ def api_mp4_files():
         if not d.is_dir():
             continue
         folder_name = d.name
-        mp4s = sorted(d.glob("*.mp4"), key=lambda p: p.stat().st_mtime, reverse=True)
+        mp4s = sorted(d.glob("*.mp4"), key=lambda p: _parse_filename(p.name)[0] or 0)
         if not mp4s:
             continue
         files = []