SPACE AND TIME = BEHIND THE LINE.
This video is about positioning yourself to stay behind the line when you're in the middle of the field. Every team that presses does it in lines. The forward line presses, the midfield line sits behind them, and the back line sits behind that. When the player on the ball has space and time, you want to be behind the midfield line, not in front of it.
Most midfielders gravitate towards the ball during build up. You move towards it and ask for it to your feet with your back to goal. This makes you a pressing trigger. The defender can see you and the ball in the same frame, so she doesn't have to split her attention. She's already facing the direction the ball is traveling and can press you at full speed. You're also facing your own goal, which makes it harder for you to turn forward. But when your center back has space and time, this is the cue to stay behind the line and receive the ball between the lines instead.
Staying behind the line does several things. If the midfielder marking you follows you back, that creates space for your center back to dribble into and find other options. Or you might not receive the ball directly, but you can become the third option. The ball goes through your striker, then back to you, and now you've eliminated the midfield line. This is the positioning that makes you impactful in the game.