The video makes that clear...you should watch it!
The video is a review of the views of George Frazier, who was not a Christian and presented his “research” to claim all religious beliefs, including Christianity and Christ’s Resurrection are but re-plays of human belief systems modified throughout history.
Are you pushing the view that the death and Resurrection of Christ is a lie and a re-hash of older pagan beliefs?
That is what the video you link to states.