You started under him, was never out of sight, and after he pulled back and the N1K, yaj, 109 and some other stuff came along, your 51D followed in a true path - by 2k out, he should have been aware that you were following him for a good 5 mins by then and closing and slowly gained alt to get over him. . .
thats not a pick, thats following your pray for 5 mins for a kill.
A pick is a little more one sided imo and probably what that super high alt guy in the vid was after.
but I have no idea - seemed like it would have ben a great 1v1 actually considering there was no one around by the time you engadged.