Discovered Jazz and Swing in middle school and have been a fan ever since. Collecting 78s, which I started about 35 years ago, has helped me expand my musical horizon. One of my areas of interest is now also the "ethnic" or foreign-language music on shellac that Columbia, Victor, and many other labels produced for immigrants to the United States between the 1910s and 1950s.
I've fixed the English language title, which had been entered in Spanish, and removed Children & Family based on the plot summary and the genres assigned to it by IMDB: https://www.imdb.com/title/tt0082766/
I definitely enjoyed this movie too, and it inspired me to read Eberhard Fechtner's biography of the Harmonists, "Lebensläufe." Most of the songs the Comedian Harmonists sing in this movie are the original recordings, except digitally cleaned up and enhanced. The song "Auf Wiedersehen, My Dear" which they sing to great effect in the movie at their last concert before being banned from any further performance was, if I remember correctly, what they sang at the end of all their concerts.
In reality, of course, the Comedian Harmonists were banned from performing in Germany, but able to perform and record abroad for another year or so. The plot is, as is usual for these musical bio pics, not true to the letter but a very free adaptation of the facts. One of the comments on that Youtube video is:
"Great music but a cheesy and almost entirely fictional script. The dialogue in one scene, concerning quality of German music in the 1920s, was an absolute insult to great Weimar-era composers like Rudolf Nelson, Mischa Spoliansky, Friedrich Hollaender, and Kurt Weill. Clearly, the script writers had no clue about the rich musical scene in Berlin during the 1920s."