Interesting topic and video @KarenVChin
I don’t drink hot water everyday, but I always try (not to forget) to drink a cup of hot water when I wake up exactly before doing a morning exercise. It is said that drinking hot water in the morning is good for a detox. It makes by whole body soothing as well. As a coffee fan, I mostly prefer hot black coffee rather than the cold one. Since I live in Indonesia with two seasons : summer and rainy. When the summer comes and the weather is so hot, I definitely will prefer the cold beverage.
I just knew from the video that in the ancient time, there was “laohuzao” , a shop that only served hot water. Wow… Even hot water was sold back then 
And just like @TsekoV said, drinking hot water can be a good medicine. When you have a sore throat, drink lots of hot water might help!