How adorable. A couple of things though:
1) Bartlett claims that the Old Testament requires the burning of his mother, since she wears garments made from different threads, and the public stoning of his brother for planting different crops side-by-side. Neither of these horrific penalties are associated with the passages he alludes to in his anti-Bible rant. While the Torah indeed forbids the mixing of the fibers or seeds, there is no specific penalty stated for the failure to do so. It was a part completely fabricated to make the biblical laws seem more harsh than they actually are.
2) This clip makes no attempt *whatsoever* to differentiate between the biblical laws that are still applicable today and those which aren't. For one thing, the Mosaic Law was never applicable to the Gentiles. It applied *only* to the Hebrew people who Moses led out of Egypt to settle in the Promised Land. For another, a large number of the laws were ceremonial and cultic regulations for the Ark of the Covenant or the Temple (both of which no longer exist) or practical regulations related to life in a nomadic desert setting. Bartlett groups them all together in an intellectually clumsy, but emotionally effective, manner, the intention of which I cannot see to be anything but an attempt at smearing both Christianity and Judaism.
3) As for homosexuality, Leviticus 18:22 hardly represents the only passage in Scripture which points to God's standards for marriage and sex. It is laid out by Jehovah in Genesis 1-2 and affirmed by Jesus in his teachings on marriage in the New Testament. There's also Paul's teachings on sexuality to confront. None of this is to sanction hatred or bigotry towards LGBT people, but it does prove that the perception of a Christian person opposing the "redefinition of marriage" basing their opinion solely on Leviticus is flawed and inaccurate.