How to get H.264 for After Effect 2018 ?

Hi,

Who knows how to get the encoder H.264 in the version of after effect ?

I really need it to make videos with a good quality for my youtube channel Children's Tv Funny 

My best video for the new year :)   https://youtu.be/7GLhqpf9OEk

My 2D animation in : Children's Tv Funny https://www.youtube.com/watch?v=HIbCXLTFuPQ&list=PL1X6Mnias5LwDfOMx3ywvIhIP0g5YBMWZ&index=1