That Look Up video is the projection of a person's insecurity in rejecting current social norms in favor of an idealistic, imagined, past.
Nobody talked to fellow passengers during train rides before smartphones. Kids are taught to stay away from strangers in public places.
People tend to ignore people they don't know who try to make conversations, thinking they're creepy and want something.
Yes, we look at our screens almost all the time and we interact with people we otherwise wouldn't buy we do it safely and securely.
The more secure we feel, the more likely we'll engage in interactions. We know more people, we become more connected. We are richer for it.