I see that The Jewish Soul: Classics of Yiddish Cinema (Blu-ray) - Kino Lorber Home Video has been discounted - it's now under $30, and even cheaper at Amazon. I gave into (or is that "gave in to") temptation, and bought a copy at amazon.mudcat.org.
After watching 10 movies, my Yiddish should improve vastly. I was pleasantly surprised that I could understand what people were saying when I was walking the streets of the Yiddish-speaking part of Jerusalem.