I guess this is a 'Marmite' argument from the Guardian's Mona Chalabi: you're quite likely either to love it or hate it. When the video was posted on the paper's website in 2016, the bottom of the page quickly filled up with conflicting responses from viewers.
Personally I'm irritated by her assertion that most grammar mistakes 'really don't matter at all', but agree with her plea for people to spend more time 'listening to what others have to say' rather than picking holes in the way they say it. Or to put it another way, can't we listen respectfully to people regardless of how they express themselves, and also aspire to high standards of English?