diff --git a/croppa/main.py b/croppa/main.py
index 8a7d86e..ab0718f 100644
--- a/croppa/main.py
+++ b/croppa/main.py
@@ -109,8 +109,8 @@ class ProjectView:
         self.selected_index = 0
         self.scroll_offset = 0
         self.items_per_row = 2  # Default to 2 items per row
-        self.window_width = 1200
-        self.window_height = 800
+        self.window_width = 1920  # Increased to accommodate 1080p videos
+        self.window_height = 1200
         
         self._load_video_files()
         self._load_progress_data()
@@ -511,8 +511,8 @@ class VideoEditor:
         # Mouse and keyboard interaction
         self.mouse_dragging = False
         self.timeline_rect = None
-        self.window_width = 1200
-        self.window_height = 800
+        self.window_width = 1920  # Increased to accommodate 1080p videos
+        self.window_height = 1200
 
         # Auto-repeat seeking state
         self.auto_repeat_active = False
@@ -1872,23 +1872,39 @@ class VideoEditor:
         height, width = display_frame.shape[:2]
         available_height = self.window_height - (0 if self.is_image_mode else self.TIMELINE_HEIGHT)
 
+        # Don't downscale - keep original video quality
+        # If video is larger than window, we'll handle it by resizing the window
         scale = min(self.window_width / width, available_height / height)
         if scale < 1.0:
-            new_width = int(width * scale)
-            new_height = int(height * scale)
-            display_frame = cv2.resize(display_frame, (new_width, new_height))
+            # Resize window to fit video instead of downscaling video
+            new_window_width = int(width * 1.1)  # Add 10% padding
+            new_window_height = int(height * 1.1) + (0 if self.is_image_mode else self.TIMELINE_HEIGHT)
+            
+            # Update window size
+            self.window_width = new_window_width
+            self.window_height = new_window_height
+            
+            # Resize the OpenCV window
+            window_title = "Image Editor" if self.is_image_mode else "Video Editor"
+            cv2.resizeWindow(window_title, self.window_width, self.window_height)
 
         # Create canvas with timeline space
         canvas = np.zeros((self.window_height, self.window_width, 3), dtype=np.uint8)
 
         # 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)
         start_y = (available_height - frame_height) // 2
         start_x = (self.window_width - frame_width) // 2
 
-        canvas[start_y : start_y + frame_height, start_x : start_x + frame_width] = (
-            display_frame
-        )
+        # Ensure frame fits within canvas bounds
+        end_y = min(start_y + frame_height, available_height)
+        end_x = min(start_x + frame_width, self.window_width)
+        actual_frame_height = end_y - start_y
+        actual_frame_width = end_x - start_x
+
+        if actual_frame_height > 0 and actual_frame_width > 0:
+            canvas[start_y:end_y, start_x:end_x] = display_frame[:actual_frame_height, :actual_frame_width]
 
         # Draw crop selection preview during Shift+Click+Drag
         if self.crop_preview_rect: