This is my opinion...People do business with those they know like and trust. So my job as a business person, content creator, etc...Is to get people to know like and trust me. When I'm smiling on camera, that job becomes easier.
BUT....I also see the massive value in training videos, white board videos etc that I may not show my face.
The important thing ....Doing videos!
I see your point just get out there and do it, we can debate the particulars later :-)