The following video is real. The animals are eating the fermented fruit of the Marula tree.
The Marula (Sclerocarya birrea) is a medium-sized dioecious tree, indigenous to the miombo woodlands of Southern Africa and the Sudano-Sahelian range of West Africa. The tree is a single stemmed tree with a wide spreading crown. It is characterised by a grey mottled bark. The tree grows up to 18m tall mostly in low altitudes and open woodlands. The fruits are used in the liqueur Amarula. The distribution of this species throughout Africa has followed the Bantu in their migrations, as it has been an important item in their diet since time immemorial.
The marula fruit is also eaten by various animals in Southern Africa. In the movie Animals Are Beautiful People by Jamie Uys, released in 1974, some scenes portray elephants, warthogs and monkeys becoming intoxicated from eating fermented marula fruit. Later research showed that these scenes were improbable and, in all probability, staged. Elephants would need a huge amount of fermented marulas to have any effect on them, and other animals prefer the ripe fruit. The amount of water drunk by elephants each day would also dilute the effect of the fruit to such an extent that they would not be affected by it.