diff --git a/app.py b/app.py
index 72113c6..1ff14a5 100644
--- a/app.py
+++ b/app.py
@@ -1,8 +1,10 @@
 import os
+import re
+
+import google.generativeai as genai
 import streamlit as st
 from dotenv import load_dotenv
 from youtube_transcript_api import YouTubeTranscriptApi
-import google.generativeai as genai
 
 # Load environment variables
 load_dotenv()
@@ -14,22 +16,31 @@
 prompt = """Welcome, Video Summarizer! Your task is to distill the essence of a given YouTube video transcript into a concise summary. Your summary should capture the key points and essential information, presented in bullet points, within a 250-word limit. Let's dive into the provided transcript and extract the vital details for our audience."""
 
 
+def get_video_id(youtube_video_url):
+    match = re.match(
+        r"^(http|https)://www\.youtube\.com/(v=|watch\?v=)([a-zA-Z0-9_-]+)", youtube_video_url)
+    if match:
+        return match.group(3)
+    else:
+        raise ValueError("Invalid YouTube URL format.")
+
 # Function to extract transcript details from a YouTube video URL
+
+
 def extract_transcript_details(youtube_video_url):
     try:
-        video_id = youtube_video_url.split("=")[1]
+        video_id = get_video_id(youtube_video_url)
         transcript_text = YouTubeTranscriptApi.get_transcript(video_id)
-
-        transcript = ""
-        for i in transcript_text:
-            transcript += " " + i["text"]
-
+        transcript = " ".join([item["text"] for item in transcript_text])
         return transcript
+    except ConnectionError:
+        raise ConnectionError("Network error occurred.")
     except Exception as e:
         raise e
 
-
 # Function to generate summary using Google Gemini Pro
+
+
 def generate_gemini_content(transcript_text, prompt):
     model = genai.GenerativeModel("gemini-pro")
     response = model.generate_content(prompt + transcript_text)
@@ -43,8 +54,9 @@ def generate_gemini_content(transcript_text, prompt):
 youtube_link = st.text_input("Enter YouTube Video Link:")
 
 if youtube_link:
-    video_id = youtube_link.split("=")[1]
-    st.image(f"http://img.youtube.com/vi/{video_id}/0.jpg", use_column_width=True)
+    video_id = get_video_id(youtube_link)
+    st.image(
+        f"http://img.youtube.com/vi/{video_id}/0.jpg", use_column_width=True)
 
 # Button to trigger summary generation
 if st.button("Get Detailed Notes"):