That was...entertaining.
I have known three DIs, and all three were about as different as they could be. One was our active duty I&I first sgt on his sunset tour. He came to I&I staff from the drill field. He was a hoot, loved practical jokes, not once raised his voice.
The second was a buddy, a guy I met surfing at Camp Del Mar. Fully, like, totally rad surfer dude, man. That's how he talked. I could not picture him as a DI; then I met him for lunch aboard San Diego and saw him in action. Made a believer out of me.
The third was the gunny assigned to my platoon at officer school. When he found out I had been a FMF corpsman he was in my shit 24/7. I paid for every sin ever committed by a corpsman. "Did YOU lose my medical record?? DID YOU??" At the end of school he told me he did that because he knew I could handle it.
These guys, the guys in the video, NOTHING like the RDCs in Navy boot.