0:00 topic
0:12 butt stretch ①（Gluteus maximus）
1:42 butt stretch ②（Gluteus maximus）
3:07 back thigh stretch ①（hamstring）
4:36 back thigh stretch ②（inner\ hamstring）
6:04 back thigh stretch ③（hamstring）
6:47 inner thigh stretch ①（adductor）
8:15 inner thigh stretch ②（adductor）
9:40 inner thigh stretch ③（adductor）
10:32 coxa spinning exercise
11:26 leg split stretch ①
12:04 leg split stretch ②
12:57 leg split stretch ③
Leg split stretch related video↓
For those who can only split their legs 90 degree angle...
https://www.youtube.com/watch?v=2gb2LlmK5XQ&t=9s