From the video, I laughed at the comments of hearing the other tenants.
With my windows open in Sapporo Japan during the summer I can here conversations clearly. I think from the floor below, guessing it bounces off the next building which is but a couple meters away. I know every time the baby wakes wet. During the winter with double windows I don't hear as much but I do hear my neighbor belting out the songs in the shower. Like the commentator in the video, it does create a sense of connectivity. If he's happily singing in the shower then I'm happy for him and it makes me smile every time.
However it makes me a little self conscious and I try to be quiet as possible.
Also very surprised to see a guitar in the video. Most agencies will ask if you have instruments and likely deny or limit your apartment choices.