I have a really dry sense of humor. I don't think it's funny when people wink at the camera. That's more of an actor thing, just committing to whatever the thing is.

This quote means that the person speaking has a sense of humor that isn’t very light-hearted or silly. They don’t find it amusing when someone winks at the camera because they consider it to be a more serious and professional thing that actors do to show that they are committed to the storyline of the production they are in.