I never had a problem with this. It's not like whole movies or long youtube videos are recorded vertically. The kind of content that is recorded vertically is mainly watched on phones, and it's not like it's unwatchable on any other screen. Never once have I seen anyone say anything about it that is anything more than mild inconvenience about something they really shouldn't care that much about. It's just stereotypical "complaining because you can" bullshit that is so common.