Add examples, add percentage description

app.py

@@ -225,6 +225,9 @@ def summarize_text(url, percent):
   yt = YouTube(url)
   video_html = f'<div id="video-container" style="position: relative; width: 100%; padding-bottom: 56.25%;"><iframe id="video" style="position: absolute; width: 100%; height: 100%;" src="{yt.embed_url}" frameborder="0" allowfullscreen></iframe></div>'
 
+  if summary == "":
+      raise gr.Error(f"Could not retrieve the video's transcript. Please try another video")
+  
   return summary, video_html
 
 """## Text-to-Speech Module"""
@@ -289,13 +292,14 @@ with gr.Blocks(theme=theme) as demo:
     with gr.Column():
       fn = summarize_text
       url_input = gr.Textbox(label="URL", placeholder="Ex: https://youtu.be/JOiGEI9pQBs", info="Input YouTube URL")
-      slider = gr.Slider(5, 100, value=20, step=5, label="Percent", info="Choose summary length")
+      slider = gr.Slider(5, 100, value=20, step=5, label="Percent", info="Choose summary length (the lower the number, the shorter the summary)")
 
       with gr.Row():
         summarize_btn = gr.Button(variant="primary", value="Summarize")
         clear_btn = gr.ClearButton()
 
       video_preview = gr.HTML(label="Video Preview")
+      examples = gr.Examples([['https://youtu.be/libKVRa01L8'], ['https://youtu.be/v6Agqm4K7Ok'], ['https://youtu.be/HpcTJW4ur54'], ['https://youtu.be/gjVX47dLlN8']], inputs=url_input)
 
     with gr.Column():
       summary_output = gr.Textbox(label="Summary", interactive=False, show_copy_button=True)