When I render at 1080 quality it isn't really that quality, I have no idea of what's happening but I can see that the quality is not perfect. Here is a video, its in Spanish and is a game play so mute the sound and look how everything is a little pixelated:
File information: https://gyazo.com/b624e8748daeb14a3d58ce631e810866
Thanks and hope you can help!
Program used: OBS