Stuck Pixel/ Bright pixel

I have had this iPhone eight since close to the beginning of the year and a couple months after getting the phone I noticed that there is one pixel that is brighter than all the rest. It stand out like a sore thumb, especially on a white background. It’s in the top left area of the screen close to the volume buttons. I have tried rubbing the spot and played a 10hr video or two but with no luck. When I first noticed it I thought about taking it to apple but it was such a small thing I didn’t really think they would fix it but my phone is still under warranty so now I’m wondering if I should take it in and have them look at it. Or maybe there is another way to fix this. If you know of a way I would gladly accept the advice.