  Sentiment analysis or opinion mining is the field of study related to analyze
opinions, sentiments, evaluations, attitudes, and emotions of users which they
express on social media and other online resources. The revolution of social
media sites has also attracted the users towards video sharing sites, such as
YouTube. The online users express their opinions or sentiments on the videos
that they watch on such sites. This paper presents a brief survey of techniques
to analyze opinions posted by users about a particular video.
