With Google Cardboard, use the magnet to move through the videos.
Voice control is activated with the magnet when viewing 2D videos from YouTube. To search any video, simply pull the magnet and a mic will appear. Say the name of the video and the best result will be played automatically. To scroll through the list, simply use the command “next”, or “back” to go back. “reset” will sync videos, and “play” will play.
With, SBS mode you can play mean videos that already come side by side. The video just plays normally. Only benefit you would get from this using this mode is the ability so ZOOM the video by SWIPING up or down accordingly.
The normal mode plays a video twice to create the side by side effect, but often times there is a lag between the time each video loads.