I can't stop watching that Filippa K video, the atmosphere, the models and everything : so perfect !
By the way to me his voice is not sounding so wonderful, because he's clearly reciting and it's like it's stuck or something ^^
Kayak I've checked it's definitely Shaekspare's sonnet 116 and if someone wants to make another gif with a caption what he really says is "L'amour n'est pas amour. Oh non ! c'est une marque à jamais établie " (wich I think is a better translation than in my book btw)
Originally : "O, no ! it is an ever-fixed mark".