In this set of materials both the writer and lecturer cover the issue of professors on television. Regarding the issue, the speaker contradicts the reading passage's claim that televised lectures are good for students and professors.
First, the lecturer insists that professors on television will be not reliability experts. This is because professors should choose more funny and exciting lecture for audience and broadcast. Thus the professors will be entertainers not specialist. This opposes the reading passage's explanation that professors' on television reputation will grow.
Second, the speaker argues that broadcast could have negative impact on university. To be more specific, broadcast can degrade the education quality of university. Moreover, professors could be robbed their time to research and educate students due to star in television. This casts doubt on the reading passage's assertion that popular professor on television promotes his university.
Third, the professor maintains that televised lecture cannot give depth knowledge to the viewers. This is because professor could not fully explain due to time limit. Therefore, his lecture will be superficial, less informative and reliable. This contradicts the reading passage's claim that televised lectures improve public education.