Bigfoot (cat in the video) loves giving kisses to his daddy :-).
Bigfoot's daddy uses positive reinforcement to train his cat to kiss. By rewarding the cat his favorite treat every time he does the trick correctly, it does not take long for Bigfoot to grasp the kissing trick.
Through trial and error, your cat can do it too, but remember always apply positive reinforcement and do not scold your cat if he does not get it the first couple times. Simply do not reward the cat with the treat until he gets the trick.