My Story in my snapchat is public for everyone (including those who didnt add me) to watch my videos.

I see a friend stalking me in some videos even though he didnt add me.

What's weird is, a 7 hours video doesnt have his nickname with those who have watched it, but a 5 hours ago video has his name which means he watched it.

I mean, can he pick which videos to see in my story?