The Document does not mention the blood clot in Temujin’s hand when he was born, this it because it is not very important and was probably added to entice the viewer.
That he and his family had to survive off game for much of his childhood. The reason for this is similar to why his father's death was including in both the video and document, Genghis Khan was not successful at first and had to go through some hardships as a child.
The Video does not mention Temujin being the heir to Wang Khan. This information is not vital and