Youtube is biggest Video streaming Platform, with millions of videos uploaded by its users and billions of comments for all of these videos. Youtube unlike other social Media platform like facebook and twitter it allows user to express negative emotions through dislike button. We can evaluate the public opinion by comparing number of likes vs dislikes. However, if we want to know detailed analysis of public emotions and sentiments for a certain video, we need to dig deep into the comment sections. Sentiment Analysis can be performed on comments for troll detection, polarity detection and can be used for improvement in any future video release.