videos need to be taken with a huge amount of skepticism
Sure, it's just video clips showing things the human authors want to show to others.
However, that entire argument (that animals do not have 'language', and simply associate the button or gesture with an action), is complete and utter bullshit. Using the same logic and reasoning, I can 'prove' that I am the only sentient being in the universe, and everybody else is just an automaton reacting to my behaviour. You could make the exact same video you linked to about Stephen Hawking, and claim that he was in a passive vegetative state, with his personal assistants actually controlling the speech synthesizer and his correspondence with others.
(To be honest, I do believe that majority of humans are amazingly stupid, and often wonder how individuals have managed to grow into adulthood with so little intelligence, seemingly completely unable to hold a rational thought or apply any kind of logic.)
I have interacted with animals, including wild animals, in ways that have proven to me that two-way communication does occur. I don't care about the silly argument about whether that communication is language or not, because it is irrelevant: it is like arguing whether apples are red or green, or whether strawberries are vegetables or fruit. I'm not interested in any philosophical discussion wrt. communication or language, because the two-way communication I've observed and participated in, is practical and functional.
What fascinates me about Billi the cat, is that I cannot read her expressions at all. To me, she looks
blank: I get nothing at all. (Don't read much into the tail movement, as it does vary from cat to cat, and does not always indicate anything. The original box cat Maru (mugumogu on youtube) is an excellent example.)
Thus, any kind of communication that occurs –– even if it is just a few minutes a week, among "noise"! –– is extremely interesting to me.
If it bothers you, consider it self-introspection on my part. Perhaps I am only interested in these videos, because they tell me more about myself.