User blog comment:Master Sima Yi/Assassinews 10-07-'13 — Assassin's Creed IV: Black Flag pirate gameplay naval exploration/@comment-9346289-20130719011724/@comment-9346289-20130719012840

Yeah probably a flashback, video or a sound file of a younger Vidic. Also he is voiced by Tod Fennell (The same guy who voiced Weems in AC3)