This is the silent paradox. The software’s primary use case—grabbing permanent copies of streamed video—is legally dubious. Yet the developer sells a "license" to do it better, while hiding behind a disclaimer. It’s technically legal to sell the tool; it’s illegal in many contexts to use it.
Here’s the twist the license page doesn't tell you: video downloadhelper lizenz
The user’s reaction is predictable: "You let me install two pieces of software and only now tell me it’s not free?" This is the silent paradox