I would like to know if you can show a website in general in a Youtube video in order to draw attention to the content.
Or do I have to ask separately for each website what exactly is somewhere?
At the o.g. Page is: https://www.curseforge.com/...eforge.com
If you see https://www.gesetze-im-internet.de/...g/__2.html on the website, you basically need an https://www.gesetze-im-internet.de/.../__31.html if you want to show such a work on YouTube.
But there are exceptions
UrhG https://www.gesetze-im-internet.de/.../__51.html, if you in your video on the work shown in detail and require a slip for your statements, or
UrhG https://www.gesetze-im-internet.de/.../__57.html, if the work shown is not at the center of your video, but the website in general.
What exactly applies in the end, decides the court in case of dispute. Therefore, it may be helpful to read previous judgments on similar cases.