Yeah - videos can be misleading, we all have unique signatures. Females typically have a much higher profile or signature than most males. Although I know some guys that can float on surface by adjusting position only much like the young lady in the video, arm weight in front of lungs (or center of buoyancy), hang head - pop up to the surface. Most males are pitched at 45 degs or lower with heavier hips, but takes very little kick to lift hips to the surface. This is in clear water lake or pool however. My profile is very low in clear water (60 degs), but in the salt water of the Pacific, the body is much more buoyant - I can easily float to surface with body position shift only, no kick.
So it depends on swimmers' profile or signature *and* the body of water they are swimming in, whether clear or salt water.