New to snapchat I have an urgent question please help!?!?

So my friend recently asked me to get snap chat so we could talk, I've never used it before and so far it's ok but we were just messaging back and fourth and all of a sudden it looked like he sent me a "live" video like Skype I didn't know what to do and it went away as quick as it came up but I don't know if he saw me or not. He didn't say anything about seeing me but he's never seen me without makeup and I was in bed and my hair was a mess, I guess what I want to know is did he see me? I don't think I actu accepted the live video chat but I don't really know how it works to be honest. Do I have to accept it before he can see me back or will he automatically see me as soon as he sends it? 10 points best answer!