So what was the point of the video precisely?
There are two points:
Firstly demonstrate that aircraft can depart in extraordinary ways and recover reliably and predictably. I actually agree with him about this. Some AH players have even incorporated these kind of manoeuvres into their standard ACM and if they are willing to put the considerable time and energy needed to develop & practice these then good for them.
Secondly, FLS is pressing this aspect of the topic so he can deflect attention from the observation that the AH Corsair is favourably and unrealistically modeled when it comes to the nature of departure. Gizz's Corsair should have snapped inverted and needed more altitude to recover than he had if the quote from Widewing / historical description has any validity at all. FLS would like to ignore or keep attention from this point. Additionally if you continue to differ with him you can expect more of this:
uninformed speculation.
...which is basically a subtle, forum rule-safe ad hominem attack which I already suggested he will resort to. Your opinion will be devalued by any means available if it doesn't agree with his, especially when he is personally motivated to win the argument.
Three people have so far PMed me that FLS spends a considerable amount of his TA time flying and even teaching the Corsair. Would you care to comment on this or the relevance of this FLS?
