Jacob was a recent and more "secretive" employee of Cow Chop. He briefly appeared in previous videos, but his name wasn't known to the public until Cow Chop TV episode 13.
Jacob first appeared in SALT SHOTGUN AND FIRE SURPRISES • AMAZON PRIME TIME
He was most likely a college student getting internship credits, as Trevor jokingly threatened to not give him his credits if he didn't participate in a BTS video.
Post-Jacob's Departure to Cow Chop, Brett referenced him in the Patreon.avi video referring to Jacob as the intern who would open the gate to the LA Office.
Leaving Cow Chop
On September 13, 2017, it was announced on Twitter that it was Jacob's last day on Cow Chop.
Jacob did help with the KEYBOARD MEMORIAL VIGIL • Behind The Cow Chop video, which was recorded after his departure.