After sending the replay to East and trying to recreate this situation and all of it's means, the conclusion is that I did not do a Down Air Cancel.
In fact what happened was I ended up doing a Fast Fall to Aerial Dodge and hit the ground.
What threw me off was the command input from my personal knowledge when I did the move, I clearly dropped down, hit Down C, then picked up with hitting R during the fall.
I'm guessing the Down C command never picked up, oh well, I'm glad we got it debunked. The second thing that threw me off by the way was the dust that animates. A normal Jump landing Dust has "shock waves", a short hop's dust has minimal to non "shock waves" and Down Air has no shock waves what so ever.
Producing no shock waves is possible during a Short Hop + Aerial dodge, if you do it super close. Not sure about a normal jump + Aerial dodge.
Needless to say, those shock waves didn't show up during the landing, but yeah.
Any way, yeah it was a fluke. Sorry, I failed, such a chode /facepalm
bright side: I sent East a new vid and he will go over that with me on what I call reverse crawl dashing, that gives a sliding boost property to Down smash. Sort of like the Yoshi Island crawl dashing, but not such a large scale boost or need to jump.