A Report on the Party and the Guests
O slavnosti a hostech (original)
Starring Ivan Vyskočil, Jan Klusák, Jiří Němec, Pavel Bošek, Karel Mareš, Evald Schorm, Zdena Škvorecká, Helena Pejšková, Jana Prachařová, Miloň Novotný
It's a comedy and drama movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Austria.