A-B
I'm curious about the technique that commences the "BR" from level or nearly level flight. That must surely result in the roll itself being flown on an axis about 45' to the original line of flight and thus with a zig-zag ground track and the entry and exit tracks substantially offset. Goofing around apart, are aerobatic maneuvres not supposed to be flown on an axis (think display line)
The commonest use of the barrel roll in display flying is precisely to realign the axis, particularly useful when one has underestimated the on-crowd wind component. Not that any professional display flyer would ever do that....