For the past several days, I have been recording games with OBS on my new custom PC with a brand-new $100 LG monitor. During recording, I can record games in 1080HD with absolutely no hiccups in gameplay whatsoever. However, when I watch the video after I play, the video quality is terrible and absolutely horrendous. I checked the video settings in OBS, and they match my monitor settings. What's going on?

Any help you can give me would be greatly appreciated.