diff --git a/31_youtube_sentiment.py b/31_youtube_sentiment.py
new file mode 100644
index 0000000..f0f2129
--- /dev/null
+++ b/31_youtube_sentiment.py
@@ -0,0 +1,77 @@
+import sys
+import requests
+from bs4 import BeautifulSoup as bs4
+
+"""
+Example usage:
+
+$ python 31_youtube_sentiment.py https://www.youtube.com/watch?v=_vrAjAHhUsA
+"""
+
+
+def get_arguments():
+    if len(sys.argv) is 2:
+        return sys.argv[1]
+    else:
+        print('Specify at least 1 argument')
+        sys.exit()
+
+
+def get_comments(url):
+    html = requests.get('https://plus.googleapis.com/u/0/_/widget/render/comments?first_party_property=YOUTUBE&href=' + url)
+    soup = bs4(html.text, 'html.parser')
+    return [comment.string for comment in soup.findAll('div', class_='Ct')]
+
+
+def calculate_sentiment(comments):
+    positive = 0
+    negative = 0
+    negative_words = [
+        'hate', 'hated', 'dislike', 'disliked', 'awful', 'terrible', 'bad',
+        'painful', 'worst', 'suck', 'rubbish', 'sad', 'sodding'
+    ]
+    positive_words = [
+        'love', 'loved', 'like', 'liked', 'awesome', 'amazing', 'good',
+        'great', 'excellent', 'brilliant', 'cool'
+    ]
+    for comment in comments:
+        if comment is None:
+            continue
+        else:
+            for word in comment.split(' '):
+                if word in negative_words:
+                    negative += 1
+                if word in positive_words:
+                    positive += 1
+    return {'positive': positive, 'negative': negative}
+
+
+def main():
+    url = get_arguments()
+    if url:
+        comments = get_comments(url)
+        if len(comments) <= 0:
+            print('This video has no comments.')
+            sys.exit()
+        sentiment = calculate_sentiment(comments)
+        positive_score = sentiment['positive']
+        negative_score = sentiment['negative']
+        total_score = positive_score + negative_score
+        if positive_score > negative_score:
+            print('This video is generally positive:')
+            print('{0} positive / {1} total hits'.format(
+                positive_score, total_score))
+        elif negative_score > positive_score:
+            print('This video is generally negative:')
+            print ('{0} negative / {1} total hits'.format(
+                negative_score, total_score))
+        else:
+            print('This video is mutual:')
+            print('{0} positive {1} negative'.format(
+                positive_score, negative_score))
+    else:
+        print('No url supplied')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/readme.md b/readme.md
index 0bfba2f..363d345 100644
--- a/readme.md
+++ b/readme.md
@@ -30,3 +30,4 @@
 1. **28_income_tax_calculator.py**: Income tax calculator via [Taxee](http://taxee.io/)
 1. **29_json_to_yaml.py**: Convert JSON to YAML
 1. **30_fullcontact.py**: Call the [FullcContact](https://www.fullcontact.com/developer/) API
+1. **31_youtube_sentiment.py**: Calculate sentiment score from the comments of a Youtube video
diff --git a/requirements.txt b/requirements.txt
index 9d61831..b65ee68 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+beautifulsoup4==4.4.1
 PyYAML==3.11
 requests==2.7.0
 wheel==0.24.0