Funny, but beautifully sung song by Whitney Avalon, Ginny Di, and a third woman who I think I've seen before playing D&D on the official channel, but I don't recall her name. All have incredible voices & talent.
The third woman is Anjali Bhimani, who is probably best known for voicing Symmetra in the Overwatch videogame (the same game where a guy named Matt Mercer plays a cowboy). You're right that she has also been in a lot of D&D shows. Around the time the above video came out, Ginny Di also did an interview with her about doing voices for ttrpgs.