There are many ways to apply brick mortar to a wall for re-pointing.
The traditional method is to slide the mortar off of the trowel with a pointing tool.
Some masons use a bag, much like a pastry bag to squeeze it on. With this method you must be careful not to make the mortar too thin, or it will shrink back from the bricks.
You can see how he is putting it on rather proud, the after it begins to set, he strikes it off with a pointed piece of wood to give it the finished look. His final trick was to scrub the wall with a rug to get any mortar off of the face of the brick.