The video for the upcoming book from the Black Library called Mephiston, Lord of Death. It comes up for sale here shortly, here is the link
via the Black Library
Chief Librarian of the Blood Angels, Master of the Black Rage, Lord of Death... By these titles is Mephiston known to his brother Space Marines. But deep within Mephiston’s tortured heart lurks another, the spectre of who he used to be before his death and rebirth on the war-torn world of Armageddon. As Mephiston leads the Blood Angels into battle in the Pallavon system against the might of mankind’s archenemy, he must grapple with his inner daemons as well as those around him, as the ghost of Brother Calistarius, the man he once was, returns to haunt him.