That case was a) from a district court and didn't even set precedent in Finland, never mind Europe-wide and b) more importantly was overturned on appeal, with the court of appeal noting that the original court has misunderstood the meaning of the word "effective."
> This method is authorized by a French law decision CE 10e et 9e soussect., 16 juillet 2008, n° 301843 on interoperability.
That decision pre-dates France's enactment of the anti-circumvention provisions in the European Directive. It doesn't say anything about the effectiveness of system, because there was no law of the sort at the time.
VLC continues to be distributed mainly because the Streisand Effect means that nobody in the film industry wanted to relitigate the case after the anti-circumvention provision went into effect, not that these are legal in the EU.
Well, countless court rulings in Europe?
e.g., https://arstechnica.com/tech-policy/2007/05/finland-court-br...
That's why you can play or a rip a DVD with common open-source software (e.g., VLC) without requiring any special piracy tools.
See https://www.videolan.org/developers/libdvdcss.html for details.
> libdvdcss is a library that can find and guess keys from a DVD in order to decrypt it.
> This method is authorized by a French law decision CE 10e et 9e soussect., 16 juillet 2008, n° 301843 on interoperability.
> https://www.legifrance.gouv.fr/ceta/id/CETATEXT000019216315/
Btw, that - as well as software patents - is why the official binaries of VLC and ffmpeg are illegal to have or use in the US.