diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 0000000..84ed918
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,7 @@
+## 2026-02-02 - [Clarifying Ambiguous Controls]
+**Learning:** Users can misinterpret 'Intensity' when it inversely correlates to frequency (e.g. 1 = high intensity/every beat, 16 = low intensity).
+**Action:** Use 'Interval' or 'Frequency' for time-based controls and explicitly state the relationship (e.g. 'Every Nth beat') in help text.
+
+## 2026-02-02 - [Gradio Feedback]
+**Learning:** Long-running processes in Gradio without 'gr.Progress' leave users uncertain if the app is frozen.
+**Action:** Always add 'progress=gr.Progress()' to blocking functions and use 'gr.Info'/'gr.Error' instead of returning status strings.
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..bacca8e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+__pycache__/
+output/
diff --git a/app.py b/app.py
index 16bee30..f3fea46 100644
--- a/app.py
+++ b/app.py
@@ -14,7 +14,8 @@
 StatusResult : TypeAlias = Tuple[str, str]
 
 
-def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity : float, start_time : float, end_time : float, output_filename : str, direction : str, playback_speed_str: str) -> StatusResult:
+def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity : float, start_time : float, end_time : float, output_filename : str, direction : str, playback_speed_str: str, progress=gr.Progress()) -> StatusResult:
+    progress(0, desc="Starting...")
     temp_dir = tempfile.mkdtemp()
 
     video_paths = []
@@ -28,7 +29,7 @@ def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity :
 
     if len(video_paths) == 0:
         shutil.rmtree(temp_dir)
-        return None, 'Error: No valid video files uploaded'
+        raise gr.Error("No valid video files uploaded. Please select at least one MP4 file.")
 
     #create output folder
     script_dir = os.path.dirname(os.path.abspath(__file__))
@@ -55,12 +56,14 @@ def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity :
     if end_time > 0:
         end_time_value = end_time
         
+    progress(0.1, desc="Analyzing audio beats...")
     beat_times, _, _ = analyze_beats(
         mp3_file,
         start_time=start_time,
         end_time=end_time_value
     )
 
+    progress(0.3, desc="Processing video cuts...")
     result_path = create_music_video(
         mp3_file,
         video_paths,
@@ -73,6 +76,7 @@ def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity :
         speed_factor=speed_factor
     )
 
+    progress(0.9, desc="Finalizing...")
     #move video to output
     shutil.move(result_path, output_path)
 
@@ -80,6 +84,7 @@ def process_video(mp3_file : str, video_files : VideoFilesInput, cut_intensity :
     beats_used = len(beat_times[::cut_intensity_int])
     status_msg = f"Successfully created video with {beats_used} cuts from {len(beat_times)} detected beats."
 
+    gr.Info(status_msg)
     shutil.rmtree(temp_dir)
 
     return output_path, status_msg
@@ -121,8 +126,8 @@ def create_ui() -> gr.Blocks:
                         maximum=16,
                         value=4,
                         step=1,
-                        label='Cut Intensity',
-                        info='Number of beats until next cut.'
+                        label='Cut Interval (Beats)',
+                        info='Cut every Nth beat. 1 = every beat, 4 = every 4th beat.'
                     )
 
                     direction = gr.Radio(
diff --git a/music_video_cutter.py b/music_video_cutter.py
index 4fabfd6..46464cc 100644
--- a/music_video_cutter.py
+++ b/music_video_cutter.py
@@ -232,7 +232,7 @@ def create_music_video(mp3_file : str, video_files : VideoList, beat_times : Bea
     final_video = final_video.with_audio(audio)
 
     # Stelle sicher, dass das finale Video nicht länger als die Audiospur ist.
-    final_video = final_video.subclipped(0, audio_duration)
+    final_video = final_video.subclipped(0, min(final_video.duration, audio_duration))
 
     # Schreibe die finale Videodatei.
     final_video.write_videofile(