Liza Koshy, Markiplier, Rhett & Link, and Hannah Hart use the power of Twitter to answer some common questions about YouTube content creation. br br Hannah Hart is the host of hit podcast "Hannahlyze This,” the self-help podcast that just can’t help itself. The podcast tackles candid conversations about mental health, as well as lighthearted takes on new self-help “fads” like rage rooms and suspension chambers.