Hello! I'm assuming you have iPad? The iPhone doesn't have a FaceTime app built in, like the iPad. You must have an email with the person you want to FaceTime with. Then when you go to the contacts page, it will say the persons number, email, share, etc. there should be a FaceTime button.
Activate Siri, then there should be an "I" in the right hand corner of the Siri dock. That shows the basics. We have a funny Siri screenshot thread Here, and of course you can also just test things. I just thought of normal words like hi, or what's up and it responded! Be careful, she has a mouth.
That's what I was wondering. I first noticed it on my grandson's face when he and I were on FaceTime. Thought maybe something oh his lens. But now I have seen it on my iPad and on my husband's. Weird. Will try cleaning lens? Can't do screen shot tonight, as hubby has turned out lights, and FaceTime doesn't work in the dark. Will try tomorrow.