Abstract: In video-based tutoring systems, users can ask the questions and receive the answers from the system and aim at facilitating a learner in video-based learning. i.e., while watching a tutorial video, the users can enter a question (or some keywords) and re-trieve potential helpful comments from the Q/A threads of Khan Academy tutorial videos using the textual overlap between the query and possible answers. It helps to find comments answer regarding tutoring systems. Moreover, this system itself is related to tutoring systems. It can be used to query Khan Academy comments according to some given keywords.