What you notice in other languages is what is different from your own. In the video, there are some real words, but the majority of the speaking is nonsense words that use common American English sounds and typical prosody. Does it sound like American English to you?
As a native english speaker I found this fascinating. I was frustrated because it sounded so much like English that I was straining to understand words that weren't really there.
What does an American accent sound like to foreigners?
As a native english speaker I found this fascinating. I was frustrated because it sounded so much like English that I was straining to understand words that weren't really there.