There is a new genre of videos on YouTube is to react on things. Especially for music video reaction. I got introduced after got into BTS.
A lot of them are having fake emotions that try to get some of the traffic from the popular music videos. Some of them don’t even know about the music videos and the artist they are reacting to.
But there are some professionals like dancer reacts on dancing videos. Director reacts on MV are good. These are good.