Instructions
Preparation:
Grasp dumbbells in front of thighs with elbows slightly bent.        Bend over slightly with hips and knees bent slightly.
Execution:
Raise upper arms to sides until elbows are shoulder height.        Maintain elbows' height above or equal to wrists. Lower and repeat.
Comments

Keep elbows pointed high while maintaining slight bend through elbows (10° to 30° angle) throughout movement.

At top of movement, elbows (not necessarily dumbbells) should be directly lateral to shoulders since elbows are slightly bent forward. Dumbbells are raised by shoulder abduction, not external rotation.

If elbows drop lower than wrists, front deltoids become primary mover instead of lateral deltoids.

To keep resistance targeted to side delt, torso is bent over slightly. See other view and Lateral Raise Errors.