Highly Recommended: Bach Cantata DVD
What was a delightful surprise to me is that the DVD features explanations and comments by Koopman about the music of the Cantatas and how Bach wrote his music and the style, etc. It is really very wonderful. If you are interested in being introduced to Bach’s Cantatas, I could not recommend a better way to get to know them than this. You are able to turn on English subtitles so you can easily follow what the singers are saying.
The DVD features BWV 106, BWV 13, BWV 140 (the great Wachet Auf/Wake Awake cantata), BWV 147, the Coffee Cantata BWV 211), and BWV 56.
I found it on Amazon for $23.