Watching 3rd downs can be a good indicator of what the offense likes to do when it needs to make a play.
Yellow will motion across the foramtion. Blue CB will follow which tells the QB it's man coverage.
vs Cover 2 Man
Yellow sets into a stack with red.
Both red and yellow stem to the outside maintaining their stacked look. In Cover2 Man, the slot CBs want to play with inside leverage to keep WRs away from the middle of the field, where the seam between the two safeties exist. You can see one defender with his hips turned to the outside, playing inside leverage. The blue CB is being picked via interference from his own team mate, and can't defend yellow.
Red runs enough interference for yellow to get separation from his defender, and works the middle area of the field.
Yellow is easily schemed open against man coverage. Simple throw for RAC.