The professors have very informative and brief video lectures , and taking the questions and quizzes right after the lectures is very helpful in staying engaged without using up too much of your time .####[['video lectures', 'presentation quality', 'positive', 'very informative'], ['video lectures', 'presentation quality', 'neutral', 'brief'], ['NULL', 'assignments quality', 'positive', 'very helpful'], ['NULL', 'assignments workload', 'positive', 'without using up too much of your time']]