I’m not a Christian, let alone a Bible expert, but I wasn’t aware that Leviticus was supposed to be “the word of Jesus Christ”, as this guy says.
With you on all counts.
We Christians believe that Jesus is the Word of God, including Leviticus the Law of Moses, made flesh.
John 1:1
In the beginning was the Word, and the Word was with God, and the Word was God.
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14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.