niall

 

It's a very interesting question.

Logically you can do aikido techniques from either foot and you will find differences between styles and individual teachers. You can do a right irimi nage for example by stepping in to throw with the left foot (and some schools do shiho nage like that). It just makes more sense to do forward techniques by entering with the back foot (the one closer to the attacker) because you can make a bigger movement, giving yourself more space and momentum to control and attack the uke's centre.

Dan seems like a sincere guy and it's completely unfair to judge him from an aikido point of view because in the end he just doesn't do aikido. Many aikido teachers would have problems with students not doing the technique in front of their centres, students doing the technique high near their faces, and their heels coming off the ground for example. Maybe his way of doing the technique could be effective in MMA - I don't know. Why not talk about it with your teacher.