Gibberish

I recently solved a cipher that turned out to be a Homophonic cipher, but instead of using the backdoor, I found the encryption key was in the video description along with the cipher.

I then applied it to it and the message appeared to be a Vigenere cipher that I solved without the key, but it still looked like some non-sense words, however the encryption key was the word; "talk" suggesting that its nothing but gibberish since talk is a way to describe something that is, since these ARGs don't reveal anything, but the solution when solved.

Even the voice during the video sounded like non-sense words instead of another language?