Gorilla Gentaro is worried about Kintaro, who was beaten by his dad, and rushes to his rescue. 

Momotaro and Kintaro were playing. At that time, Kintaro chased Momotaro. Momotaro got angry and hit Kintaro. Gentaro rushed to rescue Kintaro. (Gorilla family in the past)
Other videos include Momotaro and Gentaro sitting and relaxing, and Momotaro lying down on a high place and relaxing.(Gorilla family in the present)
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I am writing it using translation site.If words are wrong, I am sorry.
This is a video of the Momotaro family taken some time ago.