EN: '[...] some things to put together. You see that if we look at the mean or the median, the mean is when a distribution is like this [indicates a bell curve with his hands], we can calculate a mean, but when it's like this [wiggles his finger], you can't calculate a mean, you do the, the, the bar which separates them in half. And so [...]'

FR: '[...] d'objets de mettre ensemble. Vous voyez que si on regarde la moyenne ou la médiane, la moyenne c'est quand une distribution est comme ça, on peut faire une moyenne, quand elle est comme ça on n'a pas [...] pour faire une moyenne, on fait, le, le, le, la barre qui sépare à moitié les uns les autres. Et donc [...]'

There's a short phrase I can't quite catch at about 9s... which literally translates as 'we don't have [...] to do a mean', so I'm inferring that he means 'you can't calculate a mean' from context (previous clause 'on peut faire une moyenne' => 'we can do a mean' => 'we can calculate a mean').