The pilot of "Skyhawk 2" is watching his collegue in "Skyhawk 1" closely for the nod indicating he will apply full throttle. A perfect formation take off is coordinated this way.
The Skyhawks at Wittmund are operated by BAE Systems / Flightsystems. They are adopted by the JG71 Richthofen squadron as "Dartstaffel 713 Richthofen".