I'm french, so can help you with the video.
In the video you linked he is explaining that he tested 2 different types of organic fertilizer. When he is pointing to vines on different poles, he is explaining how to determine if the plants are growing well. The longer the internode length, the stronger the plant. The one with short internodes was not getting enough nutrition. He explained that the one with long internodes recieved the fertilizer pellets about a month prior, and the plant had a tremendous growth spurt of long fat internodes.
On other plants he is testing a liquid organic fertilizer. Then the larger plant he showed, with pods, was only 18 months old. Once the plant reaches the top of the pole he lets them fall over and grow downwards.
On his Facebook page he did share a post about going out to collect coco husks from coconut farms. He then cuts them into smaller pieces and sends everything through a shedder. The poles are firmly filled with coco fiber (they pack it down after each handful added inside.)
His facebook page is very interesting though most of the time he is speaking a local language and not french! For the rows of poles, he first fills the lower 3 of the net frame with concrete. The concrete is rounded at the top so that water will flow away from the center, as stagnating water kills roots. Then a layer of whole husks is added for drainage before filling with coco fiber and something else I didn't understand. The poles are 150cm tall (5ft) and once the reach the top they fold over the horizontal bars running over the poles.