PTT announcing the Mondorf-les-Bains semi-postal in January 1940
PTT announcing the entire 2016 stamp program on 19 November 2015 via a beautifully executed, 17-minute YouTube Video
(just click on the link below to watch the video)
The speakers tell us about the background of the new issues (in German, of course), but the song is in English! Definitely worth watching, and quite a contrast to those old mimeographed announcements I used to receive. Homely as they were, they did have one advantage: up until the WW2 occupation, they were sent in covers nicely franked with the official stamps!