I searched in Baidu Xiaoyu dot square dance how can I slow play, I want to learn but fast is not good to learn I want to slow play do not know how to get.

Suggest you find a player that can adjust the playback speed. I use the "perfect person decoding", you can adjust the speed: hold down the X button to slow down to 0.2 times (generally 0.7-0.8 action to see very clearly), hold down the C button is to adjust the speed, press the Z button to return to normal. You can also open the video, press the right button of the mouse, a window will pop up, you can check whether your player has the function of adjusting the speed. If not, install "Perfector Decoder". Try it.