Julien Doré may be known for impassioned alt-pop serenades, but his videos betray a more irreverent sensibility. For the heart-racing anthem “Paris-Seychelles,” he lets a young, beach-roaming boy do the lip-synching, a device he would repeat (with the same kid) for the garden-party fantasia of “Chou wasabi.” “Pour un infidèle” ups the whimsical ante, with Doré and guest Cœur de pirate starring in their own Beatlemania fantasy.