A steadycam (also known as a steadicam,flycam & glidecam) is a device that enables smooth video shooting by stabilizing a camera and isolating it from shock and vibration.
Steadycams and other devices allow a camera to move smoothly through a
scene or while tracking a subject. The smooth motion in video enables
easier focus on a subject and better clarity. That improvement
dramatically affects action in videos such as sports broadcasts, making
the action easier to follow. Steadycams also can dramatically improve
inherently shaky video taken from mobile devices, such as smartphones.