Place one leg on a stair or chair. Make sure you have support nearby whether the railing of the stairs or armrest of a chair.
Squeeze your glutes on your back leg, brace thru the core, and sink into a stretch for the front of your hip on the back leg.
For those of you that don’t have balance issues the second stretch shown in this video is a great stretch for the front of the thigh and the hip. This stretch can help to relieve hip and knee pain when it is due to a shortness of the tissues or tight muscles.