good morning my friend! Do you record your gameplay on PS4? I noticed that the resolution is 720p. I also have a channel recording short gameplays of The Last of Us 2, and I'm working hard to improve the quality of my videos without having to buy a capture card (I don't have the money to buy one).
If so then you can go to settings then go down until you see sound and screen. Once you're there you can go to video output settings. And you can change the resolution of your videos