So techniques can only exist within one system? And that looked nothing like the Aikido technique cut into the video prior to him excuting it? Which it did. That isn't what you asked for. You asked for Aikido used in real combat, which is what you got. Now you want to move the goalposts so you can dismiss this video. Like I said, you will find an excuse to dismiss any evidence presented, making presenting any evidence an exercise in futility. Does someone trying to punch you not qualify as fighting back? Aikido, from my limited understanding, works on people who are unbalanced, either by the practitioner, or in this case the guy lost his own balance, allowing the technique to be performed. Now you are saying it doesn't count and the guy has to be on balance so he can resist. Then no, it doesn't work. You have to unbalance your opponent. Aikido also has atemi, so you can hit to unbalance before applying a lock or throw. Oh wait, no you can't, because that would be a "poorly executed boxing punch, not Aikido". Silly me.