Listening to it. I have read some arguments for who wrote his works....
Professor Willis says that the Anti-Stratfordians are skeptical because they believe that a man born in a backwater town like Stratford could not have written Shakespeare.
I don't see how the birthplace has anything to do with the argument. The skepticism comes from the lack of books, the illiteracy of the family members, the lack of manuscripts, the lack of legal, medical, or scientific education, the lack of exposure to court life, the lack of travel. Nothing about the Shakespeare of Stratford fits with the Shakespeare of the poems and plays.
Otherwise, I think that Professor Willis presents both sides including the fact that Strafordians mostly don't present an argument. They just accept the word of the Stratford realestate promoters who must have build the monument. It is something like accepting the opinion of Donald Trump about the authorship of Death of a Salesman.
Willis' presentation is seven parts long. When one is done click on the next one.