"The otter cub in the video was an orphan that was placed in a group of badger orphans whilst being hand reared. Once the hand rearing had been finished, the group were split up so that the badgers could learn how to do badger things, and the otter could learn how to do otter things! All wildlife cared for at Secret World, including the orphans, are done so so with the end goal to release them back into the wild."
-taken from original YouTube post