Comment jouer aux billes dans un espace courbe ? - Schapira - Une question, un chercheur - 04/04/19

Picked one by one from a mixed channel. Transcript check: both title readers certain; 5 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule:

A 80-minute video from Institut Henri Poincaré: “Comment jouer aux billes dans un espace courbe ? - Schapira - Une question, un chercheur - 04/04/19”.

Video by Institut Henri Poincaré, played through YouTube's embedded player.