Mouth of the south
Someone who tries to gain relevance and support on YouTube by talking about (and pretending to care about) other people's problems, since people would know they were full of shit if they actually started to share some of their own life experience.
The memoirs of the mouth of the south would be full of exaggeration, half-truths, and full bullshit, so rather than tone her bullshit down, she decided to get on YouTube and pretend to be concerned about problems in other people's lives, since that would make her look less narcissistic and self-centered.