can you take some higher quality shots with much better lighting. It would also help tremendously if you had a shaved head like you did in one of the pics. Whether you are slowly losing some at the corners or not it is extremely unlikely you will end up bald before you are 40 years of age given the quality and density of your hair. I was your age when I noticed something going on with my hairline and it looked really similar to yours and still does albeit sharper corners. I didn't do anything about it until I was 26 because it progressed at such a slow rate it took me that long to definitively know (or come out of denial however u want to look at it) that something was occurring.
Regardless, your hair is fantastic, noone would ever look at it how it is now and think you are even receding. Just keep an eye on it, you have time on your side.