These instructive videos by the company tell users in-depth about the features that the devices showcase. Eight-minute long S5 video highlights the modifications and the upgradations of the smartphone.  On the other hand, the Gear videos put spotlight on design and healthcare functions.

The Galaxy S5, which will be available in April, has a slightly bigger screen than its predecessor, at 5.1 inches compared with 5 inches, improved camera technology and better protection against water and dust, Samsung said.

Gear 2 smartwatch runs on the Tizen operating system rather than Google's Android software, and a stripped-down version called Gear 2 Neo, which doesn't have a camera.

Samsung Gear Fit, also targeting the fitness sector, has a heart rate monitor. The Gear Fit has a curved touch-sensitive screen and its features include a pedometer, Samsung said.