I hadn't seen Kate Welch give an interview before this DDB vid. I came away with a positive impression.
If you are hell-bent on keeping your kids insulated from everything that might encourage a naughty thought, then you shouldn't let them watch YouTube videos, ever. I have zero sympathy for any effort to keep D&D or its related media sanitized and strictly "family friendly." It irks me. I grew up with the AD&D monster manual and the original Deities and Demigods, so I can only roll my eyes when people get all indignant over innocuous vague references to "adult themes." I can't help but suspect that if the moralizers would take as much time to give honest context and understanding to their kids as they do trying to shelter them, those kids would have a much better go of it.