I think you should just calm down and let those in authority in this case decide on the real facts as opposed to assuming all the things you have - even though you're no doubt an expert after so many years flying experience - which I'm not questioning. Would the slow left turn have taken them over the edge if continued without the sharp right turn?
Maybe the leg danglers in the back might have assumed that the pilots were competent to carry out a simple ground taxiing manoeuvre. Was it a SAR aircraft with a fully SAR trained crew? I have/had over 35 years experience in both large military multi crew and large civilian aircraft but I would still think it right that the crew be judged by the appropriate authorities rather than being declared guilty on the evidence of a video clip on a website.