Best way to dice onions

"Have you ever wanted to dice an onion like a pro, the super fast and easy way? This is the best way to chop an onion small! I’ve been cutting onions wrong all this time and I was always frustrated with the results, I never really knew how to cut an onion finely, it was all a mess, each and every time. If you cut your onions the wrong way, your whole recipe might end up totally different, since onions will cook wrong."