Shining Dimly In The Midst of Despair

*takes place after the 2nd unhabited island exam*

The 3 prodigies of 2nd year Class D Ayanokouji Kiyotaka Koenji Rokusuke and Horikita Suzune managed to grab the top 3 positions amassing 600 class points and moving upto Class B(due to kiyotaka's some brilliant 4D Chess move which I haven't thought about)
(I don't think Author would take this route)
Everybody in the student body is wondering about how a class of defectives can pull off such an upset.....

after 3 weeks of Special Exam at the start of 4th semester,Students(main cast) *individually* are getting video tapes which are meant to be watched Alone about the stuff that happened behind their backs since the time they enrolled into this school,with the instructions of not discussing it with anyone else by an unknown person and their interactions would be monitered carefully,violating this rule would result in them not getting any further tapes

How would the truth affect their daily lives and can they use the information they have to the best of their use