Yea you're right I messed that up. But if you do a T-Perm then an L2 then another T-Perm and L2 you'd have three misplaced edges with red-white in the buffer(yellow on top green in front) then he'd memorize the cubies by their sticker color and orientation. Since white is on top in the buffer and red-yellow edge is where red-white needs to go he'd bring the sticker in the white stickers position up. So set up move is L2 and then a T-Perm.
I haven't seen the video in months so I could be remembering it wrong.
That sounds very similar to Stefan Pochmann's description on his original page about his BLD method. I imagine badmephisto is doing something similar. By the way, you do not need to use letters to encode images. Most of us do, but if you wanted to use colors then you could do this. This is, in fact, what Stefan suggested in his page. For letters people usually, not always but usually, recommend to encode two
pieces per image, so two letters per image. If you had, say, the white-red edge this would be the letter V for me. I would then take the Yellow-Red edge in that location and give it the letter B. So the first two pieces in that cycle are the image
Volley
Ball. If you are using colors, and want to encode two pieces per image, then you would need to have a corresponding image for white-red -> yellow-red.
If you do not wish to use two pieces per image, then just prepare more journey locations, and probably also place only one or two images per location and this could work just as well. This is just my opinion, but it uses a similar philosophy to how Boris Konrad told me that he memorizes, and he is one of the best in the world at memory sports.