YouTuber "onemeeliondollars" has a fun little video about using his iPhone to take video of zoo primates. He goes on - at the end of the video - to show that the same basic function could be used on "higher order" primates. ;)
I don't have an iPhone, but I think that it's possible to try something similar with my camera... Now all I would need to do is go to a zoo.
(Yes, yes, it's actually not a gorilla, but an orangutan. But it's not my video.)