After a #2 Engine change on G-MONG i was tasked with running the installed engine, i wet motored it over for slightly longer than the recommended time with the same result as the video. Still the EGT wasn't exceeded and no one panicked, the guys outside said it looked quite impressive particularly as it was 2 O clock in the morning. It has to be said though that the CFM56-3 on the 737-300 is prone to torching after a engine change, i've seen it several times.