Fix sorting: parse full timestamp from filename for videos

movmaker.py

@@ -498,10 +498,31 @@ def media_embedded_date(path: Path) -> datetime | None:
     return ffprobe_creation_date(path)
 
 
+def parse_date_from_filename(path: Path) -> datetime | None:
+    # Look for 8 digits (YYYYMMDD) followed by optional separator and 6 digits (HHMMSS)
+    m = re.search(r'(\d{8})[_-]?(\d{6})?', path.stem)
+    if m:
+        try:
+            date_part = m.group(1)
+            time_part = m.group(2) if m.group(2) else '000000'
+            full_ts = date_part + time_part
+            return datetime.strptime(full_ts, '%Y%m%d%H%M%S')
+        except ValueError:
+            return None
+    return None
+
 def media_date(path: Path) -> datetime:
+    # 1. Try embedded metadata
     dt = media_embedded_date(path)
+    
+    # 2. Try filename parsing for videos
+    if dt is None and path.suffix.lower() in VIDEO_EXTS:
+        dt = parse_date_from_filename(path)
+        
+    # 3. Fallback to mtime
     if dt is None:
         dt = datetime.fromtimestamp(path.stat().st_mtime)
+
     if dt.tzinfo is not None:
         dt = dt.astimezone().replace(tzinfo=None)
     return dt