NORMINAL — normal or with nominal mistake?

Solution 1:

Lol, he's here making fun of another video. In the video Intelsat 35e Launch Webcast the narrator at 11:37 min says

"Propulsion continues to be NORMINAL"

instead of "Propulsion continues to be normal".

Please check that other video, he's just making fun of the tongue slip.

Solution 2:

Riya called it. That ballcap is a huge shout-out to the SpaceX fanbase from SpaceX lead integration engineer John Insprucker (pictured), who first made the famous "norminal" verbal slip during the Intelsat 35E webcast Riya cited, and which has since made him quite the internet celebrity. As a result of his popularity with those who follow SpaceX's launches, Insprucker typically hosts their most complex and interesting flights, and among the fanbase he's often known as "Daddy Insprucker."

One of SpaceX's most endearing qualities is that their webcasts are hosted not by professional journalists, but by wrench-turning engineers from the shop floor. The chance to see some of the people at SpaceX who "make the magic happen" is much appreciated by the fan community.