Although recent years have seen a shift in public attitudes away from the traditional "boys will be boys" perception of catcalling to the understanding that it constitutes harassment, that doesn't mean there aren't still a significant number of people engaging in the same behavior.
So while this shift makes it clear that people who experience this harassment shouldn't have to put up with it, that doesn't necessarily make them feel any more safe when they're alone with someone who's making them uncomfortable.
And while it's fortunate that one teen who experienced this during a live recording wasn't as alone as she seemed, it's nonetheless clear from her videos what effect this incident had on her.