Beautiful playing and I love that sound of that “deeper tone”, more open, warmer, very slightly darker tone- I would associated all of that with the lower tuning.
This type of banjo tone would be fascinating to use on acoustic style, open tuning, heavy metal/ballad style tunes (Metallica & System of a Down comes into mind)- yes, I know it is very against the grain with the normal genre. You are probably thinking that is sacrilegious, but if you create things, you have to have an open mind. I can hear that “cross-over” based on the tone and an instrument should be limitless regardless in the style of playing.
Thank you for doing that and sharing us the video!