diff --git a/croppa/main.py b/croppa/main.py
index ad40cca..8a7d97d 100644
--- a/croppa/main.py
+++ b/croppa/main.py
@@ -2906,6 +2906,18 @@ class VideoEditor:
         # Center the frame on canvas
         frame_height, frame_width = display_frame.shape[:2]
         available_height = self.window_height - (0 if self.is_image_mode else self.TIMELINE_HEIGHT)
+        
+        # Simple fullscreen fix: scale down if video is too large for screen
+        if self.is_fullscreen and (frame_height > available_height or frame_width > self.window_width):
+            scale_x = self.window_width / frame_width
+            scale_y = available_height / frame_height
+            scale = min(scale_x, scale_y)
+            if scale < 1.0:
+                new_width = int(frame_width * scale)
+                new_height = int(frame_height * scale)
+                display_frame = cv2.resize(display_frame, (new_width, new_height), interpolation=cv2.INTER_LINEAR)
+                frame_height, frame_width = display_frame.shape[:2]
+        
         start_y = (available_height - frame_height) // 2
         start_x = (self.window_width - frame_width) // 2