The Yurchenko layouts follow the same principles required for all other round-off entry vaults.  The hurdle should move up and forward.  This gymnast has some problems to refine during her round-off; a round-off flying phase that could be more hollow instead of piked.  Her arms bend a little too much on the vault.  As a result, she leaves the table late.  Notice the dive to a round-off with the hands touching the floor almost at the same time.  Watch another example from a different angle.  Observe a yurchenko layout performed by an elite athlete.