I know I'm humanizing Rakus here but I'd like to think that, when he kisses the tree towards the end of the video, he does so out of gratitude for helping him. :-)
> I know I'm humanizing Rakus here
Out of all the species on this planet, orangutans probably have some of the emotions that are the closest to human emotions. Like, would you expect Ancient Greeks to have emotional experiences that are recognisable to you? What about Cro-Magnons? Neanderthals? Australopithecines? Where do they stop being people with rich inner lives, and turn into animals driven by instinct?
Orangutans are tree-dwelling (semi)social fruit eaters, like we were not that long ago. If you set the Tree of Life to "Zoom to Fit", we'd blend right together. "Humanizing" would be if you were talking about an octopus, a fish, or a protozoan. Different humans at different extremes already experience emotions in vastly different ways; I don't think it's unthinkable or odd that the median individual in such a closely related species might have experiences which we can relate to.
But also he looked to me like he was chewing in the last couple seconds, so maybe the other commenter saying he was just eating ants was right lol.