On solinkcloud.com :
Open up the videos page
Click on the camera that you would like to view
Click on the live button at the bottom left corner of the screen. Now you are viewing footage live. Use the cameras at the bottom of the screen to see different live views.
On the mobile app:
Click on the Live tab at the top of the screen to see live video
Once in the live tab, swipe left and right to see different cameras.