So sad, and so bittersweet. At least she was happy to see that the humans was still alive, even if she ended up superimposing her long dead love to a random human scientist (I guess we look alike to them, like others do to us. Makes particular sense as it was japanese ppl Kappa). I wonder if she will yandere herself over him because of it, despite him being someone entirely unrelated, or if the message will have been in transit for so long he already died anyway.
Also, fun that they believed that the message was truly extraterrestial. I guess they analyzed the 'paper' to figure that out, but the mere fact it received enough attention to be analyzed is weird enough.
Thou as they did end up believing it, I am curious what they think of the method of transportation: "Hm, a mostly regular paper can be folded in such a way that it can cross space and reach another planet when thrown? We must fund all our money into origami!!!"
edit: ps: Do note that she actually only learned their writing system, so she must actually have no clue what they are saying in the video clip. So all she knows is that "humans are alive, they found my message (he holds up her message, not his script), made a reply, and smiles like how that other naked monkey who I fell in love with smiles".