Rtl for free on ps4?

Is there anything where you can watch RTL for free

No, it does not exist

Yes at tv now the second link is always without an abo stop with advertising but so you can live. With your ps4 this would be possible via the internet browser.

So I have not tried it, but it goes on handy so it should also go to ps4.

I do not understand how that works

So go first on your mobile and enter tv now then click on the 2nd link