SOLUTION

I choosed to design an opening credit for the documentary ''The Social Dilemma''. My idea was to create a dark trailer to make the accent on the danger of social media. I discreetly introducing in few frame pictures found on the facebook of my friends class where they did not appear and use them as a visual for my clip
( the final result was showing front the class ). I wanted to create a doubt among them, for the most it was very old pictures that they had forgotten. To finish the opening credit, I revealed my method in an obvious way by revealing photos of each person in the room at the same time to create an impact and alert about the dangers of social media (For the most i haven't my friend class on social media so the surprise for them that i found all this pictures was very effective).