Things to remember: You must be flexible and strong. Practice your splits! Strengthen your left glute. Do pulsing lunges on both legs to strengthen your glutes. Or, hold your leg up and grab a wall. Hold for 8 counts and let go and keep your leg up. Repeat.
Don’t rock back and forth on your foot. Plant it firmly on the ground and keep your base leg straight. Squeeze your abs!
Good luck improving your leg holds!
Check out this other video below -