Two men are making hand gestures and posing for a picture.
Two friends give thumbs up to the camera.
We have no idea if the men are friends or family and we have no idea if they give thumbs up signs because there are many other gestures they could be making with their hands.
Two men may or may not be friends.  Thumbs up is not the only hand gesture.  Pictures may be taken with a camera or any number of devices.
There are other gestures besides thumbs up that they could be doing.