Get RPG devs to meet on it and start discussing whatever, then do a QA at the end with the audience. It would be more interesting than the garbage that is on TV.
In your suggestion hidden many different things.
First - ability to express his thoughts in speech and in text is a different things. Not completely but still, and that's because different sections of the brain are responsible for perception of voice, perception of visual information, perception of the text, and ability to express his thoughts in speech and in text.
Modern days are days of famous Video Era - where due to preponderance of video format attention span of a common man is significantly shorter, and section of the brain responcible for perception of text is underdeveloped (or untrained), while section of the brain responcible for perception of visual information is hypertrophied, that's why modern movies have in general stunning visuals and worst-than-mediocre script.
So, besides "ability to express his thoughts in speech and in text is a different things", there is another reason - whole PRGCodex looks like community that consist from people who prefer text over visuals, at least the basis of community.
And whole work of
Vault Dweller looks like he refers specifically to this audience, and doing his work for such people.
So, when the Twotch aims and visual-voice oriented people, his audience is text-oriented, so it is actually a bad idea, e.g. I doesn't look videopodcasts and such thing even in Russian, and prefer plain and simple good old text (btw information in videoformat passes those sections of the brain that responcible for critical thinking that's why TV is such a invaluable tool for propaganda and lie).