It’s easy! Just have a good internet connection!
In this easy method, there is no need to buy an expensive capture card for your PS4 like an Avermedia or an Elgato HD60. Adding remote play onto OBS is very easy, it just takes a few minutes. The best thing about using Remote play to stream your PS4 gameplay to pc is the ability to include party chat on the ps4. Many other capture cards you have to set your PS4 output to TV or all audio.
With using remote play, your audio is included with the gameplay.
Download the remote play app here: