I generally avoid young female booktubers - chances are, they'll be recommending YA. So I tend to watch men and older women.
I've been watching Steve Donoghue:
https://www.youtube.com/user/saintdo...able_polymer=1
Although he seems to be heading more towards non-fiction now, but his early vids are very interesting; he did a season of Golden Age detectives.
More recently I've found Jayne Catherine On Books:
https://www.youtube.com/channel/UC6F...able_polymer=1
An older female with varied tastes in reading.
For classics (as in public domain) novels, an under 30yrs female booktuber who mostly reads Victorian fiction: Spinster's Library:
https://www.youtube.com/c/SpinstersL...able_polymer=1
To name but a few.