First, the history of this type of move.
The most commonly used version of this move is the K.M. move, named for its creators Tony Kardyro and Ed Marlo. There have also been similar moves be Paul LePaul, Ascanio, Roy Walton (his Paintbrush change being a modified K.M.) and there is even something called the Ultima Thule Location that is said to be a K.M. slide type of move, but I have no reference as to where it was published. You also stated the possibilities of Harry Lorayne and Paul Harris having a similar move.
As you can see, this type of sleight has many variations and handlings from many masters of magic.
On to your variation, and yes, it is a variation, or your handling, of a K.M. move or slide.
First, this is not a one card double lift. The name in itself is a contradiction. First you perform a double lift (which, at least from the example in your video, needs work by the way), then you perform your slightly modified K.M. move as a single show, then place the double back together and turn it over. As you can see, that is not a double lift, that is a sequence using a show of a single after a lift and its subsequent replacement.
Also, as stated above, "created" is not the correct word for you to use. I am not trying to shoot you down, but instead save you from the arrogance and ignorance that comes from claiming you "created" something you simply did not. Again, I would fairly say that this is your modified handling or variation of the Kardyro-Marlo move, and nothing else.
C