Interview of a mo phone (an officiant) explaining beautifully what is the meaning of Baci commissioned by the University of Khon Kaen (part of Lao/Thai Isaan back in the late 19th century). it is in Thai/Lao. For an explanation of the baci, the most comprehensive explanation comes from French anthropologist George Condominas in his "Notes sur le Bouddhisme populaire en milieu rural lao" (Notes on people's buddhism in rural lao"). There is a pretty good description in the blog by Souli Keochanthala (Laosmonamour).
Explanations: