Video games have a very good reason to use UDP: latency and lack of head of the line blocking. This also applies to video and audio live streams. But it's not

Video games have a very good reason to use UDP: latency and lack of head of the line blocking. This also applies to video and audio live streams. But it's not the only reason to use UDP. It can open connections faster, accept out of order packets and generally offers a low overhead datagrams for building custom protocols.