Set OBS graphic?

I've been using OBS for a long time and if I move quickly in the game then the picture in the recording is always completely blurred, so I only see pixels, but if I stop or nothing moves in the picture, the picture is completely exactly as can I set it to always be accurate e.g. For Fortnite or Minecraft remains.

For this you would have to increase the bit rate to e.g. 25,000 (Settings> Output> Capture> Video Bit Rate).

Hope I could help.

I'll try it

Does that also make the streams better if I do it while streaming?

Yes.