The article misstates what the proposal actually says. It's a quota of 30% on "European works". The term is defined in Article 1 (1) (n) of Directive 2010/13/EU [1], which the proposal seeks to amend; it includes works originating in the member states, works originating in countries that are parties to the European Convention on Transfrontier Television, and works coproduced based on agreements between the EU and third countries. (There is an additional provision ensuring that the movies are actually produced mainly in these countries and not just through letterbox companies having a legal presence there.)
So, Netflix can definitely offer French movies to Belgian viewers in order to fulfill their quota or British movies (even after Brexit, the UK will remain a party to the European Convention on Transfrontier Television) to Irish viewers.
An overview on the state of the legislation can, as with most EU legislation, be found on the European Parliament's legislative train website [2].
[1] https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:...
[2] http://www.europarl.europa.eu/legislative-train/theme-connec...