Not too hard, (on the #3)
(with USB port at the botton)
The 2 buttons on the right are fake and do nothing.
The right button you hold to turn it on (goes solid yellow)
Press the left button once to take a pic (it will flash once)
Press the left button down for a couple of seconds and it will blink 3 times, this means its started recording.
Hold the power button again to stop recording
Not too sure if you are supposed to turn it off to stop recording but it has worked every time for me
Edit - How much has the seller made from this forum do you think? I reckon at least 100 people have bought one then anyone who searches google for it will no doubt direct to this thread