Frankly, I'm a little bit tired of playing this game. I think I've provided enough info to satisfy reasonable enquiry, but you're unlikely to ever be satisfied. So how about we turn it around a bit? If *you* can find a single piece of documentation from Airbus which states that full back stick will instantly (or thereabouts) deliver 17.5 degrees AoA in that configuration, then I'll sit up and take notice. I don't believe it was ever, as you put it, "advertised" as such.
The sources of the video and audio as well as the methods used to synchronise them are all documented in the BEA report, but then I suspect you know that already. What more is there to say?