Is the PC good for gaming (Fortnite, Youtube etc)?

I wanted to ask if the PC is good for stable 80Fps high setting and if you can use for other things.

Please fast response thank you

With high settings you can manage about 60-70 fps in Fortnite with the PC.

What do you mean with Youtube?

Watch?

Or own videos cut Adobe Premiere, etc.

You can watch Youtube on most machines with onboard card or GPU, except when you have some nuclear technology in it - even if you have Pentium or Celeron N-xxxx on it.
I'm not too sure about the PSU, if all that is enough.
SSD is basically good, but I would take twice its size.

If you can handle the limited, yet adequate, memory and relatively small SSD (it should be enough for Windows and Fortnite), there should be no problems.

Cutting videos should not really be a problem as long as you do not want to render short films with photorealish animated characters or Star Wars-like effects.

The power supply is good, has a certification and is enough for the system.

Another tip for the future: The PCs of Hardwarerat.de you can actually buy without hesitation.