New Orleans’ WDSU-TV Channel 8 aired this short (2:58) video recently with background on the rubboard used so much in zyeco music.  It shows one being manufactured, in stop motion, by Tee-Don Landry.  Landry claims it was his father who made the first one for Clifton Chenier’s brother Cleveland to play in the band.  A transcription is included, if you’re having problems with Louisiana-accented English.