Assassin's Tomb Walkthrough in Forli (Assassin's Creed 2)

Tell me, can anyone remember. I got stuck in the tomb of the city of Forli, there are places where you need to pull the lever yourself, then a few jumps and you find yourself on the horizontal bar. And from it you need to jump further in one jump.
Then another similar place. Again a lever, and a horizontal bar in one jump. I watched the video, everything is done apparently easily. But I just can't figure out the key combination to do it right away. He starts to sway with me and does not have time to jump.
I ask who remembers the combination of how to jump right away.
Thank you in advance .