Journée Défense et Citoyenneté is one day of "military service" which Ryan would have needed to complete if he wanted French citizenship but he couldn't be arsed.Ryan Rat's been telling more porkies... he is claiming in his last vlog that he had a chance to become a French citizen when he finished his schooling in France, but that he chose not to apply for citizenship because he didn't want to do military service ... compulsory military service ended in 2002 in France and Ryan was sixteen in 2012...
BTW, Macron introduced four-week Service national universel in France starting this year for all 16 to 25-year-olds.