Update app.py

app.py

@@ -3,7 +3,7 @@ import gradio as gr
 def return_yt_html_embed(yt_url):
     video_id = yt_url.split("?v=")[-1]
     HTML_str = (
-        f'<center> <iframe width="500" height="320" src="https://www.youtube.com/embed/{video_id}"> </iframe>'
+        f'<center> <iframe allowfullscreen width="500" height="320" src="https://www.youtube.com/embed/{video_id}"> </iframe>'
         " </center>"
     )
     return HTML_str