Thanks for your answer .
I personally turn off the sound most.
A "tutorial" I think, must also without sound functioning.
My English is not so good, and that would probably only confuse.
And there are certainly many people in the world who do not understand English.
Drawing is a Visual Art and I can imagine that some people are hearing impaired.
I personally love my voice, but I find the old Movies (Buster Keaton, Charlie Chaplin) super.
The music is just bonus.
The (music) should play no important role in a tutorial on drawing