Answer from Sang H. Kim:

Hopefully the following will help clarify the exercises for you:

For the Cross Legged Side Bend, begin from a relaxed stance. Cross your right leg in front of your left and place your right foot next to your left so that your feet are together and your legs are crossed at the ankles (your small toes are close to each other). Keeping your legs straight, bend at the waist and try to touch the floor next to your left foot. If you can touch the floor, try to place your palms flat. Focus on relaxing your hamstrings and hip.

The Y stretch is quite advanced. Begin by lying on your stomach. Place your palms on the floor like you're going to do a push-up and straighten your arms, raising your upper body fully off the floor. From here, try to maintain your upper body position while slowly swinging your right leg over your left, creating a Y shape (your upper body is the stem of the Y and your legs are the top of the Y). If you are having difficulty with achieving this position, I would recommend working on some of the less challenging hip exercises then returning to this one in 3-6 months.

Best of luck with your training,

Sang H. Kim