Thank you very much for everyone's support and compliments. XDD <3
@3xSwords: The most important part I believe is timing the aerial so it ends at a certain point above the ground. Sometimes I think the jump is pretty important, but it seems like if you get the aerial timing right, you can be a little sloppy on the jump as long as it's while you're above the ground.
@Mr X: This helps juggling immensely. You never touch the ground, so you have no lag, giving your opponent less time to react. And if they airdodge, you have more options to hit them before or after the airdodge itself. Take Pikachu for example, you can do a rising Uair and then an Uair at the peak of your SJR'd jump, then repeat.
And this obviously isn't as useful as L-cancelling, but so far it's the closest we've come.
@skrach8: The video description is SLIGHTLY outdated. If you look at the steps in the OP, you'll see that I made the definition for "like autocancelling" more precise and what I originally meant to say.
@Steck: For some aerials, you have to time them early, like as soon as you second-jump. This makes some moves less useful, but if it is what you have to do, it's what you have to do. :/ Tap jump doesn't affect this I don't think... I do it fine with my Y button.
Again, I thank everyone for believing in this technique. XD Especially the mods and BRoomers who haven't overlooked this as useless, as they pretty much have the biggest voices in the community.