Everyone can do this exercise - EVERYONE!
However, everyone's starting point will not be the same. The trick here is focusing on where the knee is to the wall. The closer the knee is to the wall, the greater the stretch.
Please watch the whole video so all important tips are heard and understood. Do this stretch daily and or 3x weekly. Hold each side for 3-5 minutes and focus on the more painful position. For example, I focus more on the first part, where both hands are on the floor.