fast game

When i record games that have fast gameplay or the camera is moving fast, the recording becomes pixelated during those movements. The problem isnt present when i record with the Xbox Game app, but those videos are also not 2560x1080 but 1920x880p, so i guess that could also be a reason for that...

Hi! I would like to record minecraft on my very low end PC. Minecraft is fast (I have 120 fps, sometimes fps drop to 40 fps), but video from OBS is lagging... I don't want to buy new PC, because I don't have any money. :D What would you advise me to record my beloved Minecraft without lags...