I have a question regarding the first turn in Bassai Dai, just after the first move of the kata (0:12):
Why is there a turn here?
A few possible explanations come to mind:
1. There is some kind of throw after the first move of the kata, which is represented by the turn.
2. Because the previous move ends with a Kosa Dachi (cross-legged stance), and the relevant bunkai is best demonstrated with the left leg forwards, the easiest way to get to this position is by turning (instead of taking the left leg forward from behind the right leg awkwardly).
3. The relevant bunkai intends to be applied from behind the opponent (seems less likely to me in this instance...)
4. Considering the rest of the kata, this is the best way to avoid going too much forward, i.e. space considerations (also seems less likely to me, as the kata could have been constructed in many different ways which solve this)
Any interesting ideas and suggestions?