Assassins Creed 2 Venice Viewpoint problem (solved, read description)

Video from the game Assassins Creed 2. This is a specific tower/viewpoint located in Venice and it is impossible to reach the top until a specific type of jump is learned. For anyone who is stuck here, keep playing the story missions in Venice and eventually someone will teach you how to perform that jump. Don't worry about this viewpoint until then. I first made this video when I was stuck here and I wanted to ask for help. That's why it doesn't show me reaching the top after I figured out the solution.