While LaurieWired isn’t a linux youtuber she does use it here and there, and her content is in general very interesting reverse engineering stuff. And I like the Serial Experiments Lain theming she uses, complete with Copland OS in this video, but also other old late 90s early 00s OS’es.
Jill from Destination Linux has already been mentioned, and then the only other linux woman youtuber is probably Wendy from Linux Out Loud..