I want to stream my Xbox on my PC so that I can see the screen on my PC.
On the Internet I can only find the solution for the old version of the Xbox app on the PC, but I have the new one.
I have an Xbox One S.
I don't want to buy a capture card!
I would just recommend you to look out for a capture card. A capture card is a device to which you can connect all devices via HDMI and transfer the image to the PC. There are inexpensive models from around 40-50 euro. However, if you can also spend a little more, I recommend a model from Elgato e.g. The HD60s / s + which can be purchased for around 150-200 euro. Of course, you have better image quality, as well as smoother and faster transmission.
I don't want to buy a capture card
Then you won't be able to stream the way you want.
If you don't want to buy a capture card, you won't be able to stream from your PC.
Then you only have the option to stream from your console.