Your video is incorrect, there are only five extant crane species in the Grus genus: the Common Crane (Grus grus), the Black-Necked Crane (Grus nigricollis), the Hooded Crane (Grus monachus), the Red-Crowned Crane (Grus japonensis), and the Whooping Crane (Grus americanus) The wattled crane, demoiselle crane, and blue crane all belong to a separate subfamily (Anthropoidinae) from true cranes (subfamily Gruinae) where the wattled crane belongs to the monotypic genus Bugeranus and both the demoiselle and blue cranes belong to the genus Anthropoides Thus dividing cranes (family Gruidae) into fifteen extant species under six genera and three subfamilies