Maybe you can try swiping neck from side like they do in anime, so right anker is at the titan's neck and left one is at the wall, like you did in this video, but you start from side, whether it's next to the titan or other building, and pull right one hard but also pulling left one just little to not bump into its neck, but to fly by its neck. About landing after that, I'm not sure if this is possible, but pulling left one after that may be the way sollution