minor fixes

video_tool.py

@@ -2,8 +2,8 @@ import ffmpeg
 
 
 def convert_video_to_audio(input_file, output_file, start_time, end_time):
-    print(input_file)
-    print(output_file)
+    print(f"INPUT: {input_file}")
+    print(f"OUTPUT: {output_file}")
 
     (
         ffmpeg
@@ -14,6 +14,10 @@ def convert_video_to_audio(input_file, output_file, start_time, end_time):
 
 
 def add_subtitle_to_video(input_file, subtitle_file, output_file, start_time, end_time):
+    print("ADD SUBTITLE")
+    print(f"INPUT: {input_file}")
+    print(f"SUBTITLE: {subtitle_file}")
+    print(f"OUTPUT: {output_file}")
     (
         ffmpeg
         .input(input_file)