Got 2 of them.

First one is BlackHawk by Swexx. This is one of the first parkour replays I ever saw and also the one that has amazed me the most. Everything is in place here. The replay is constantly smooth and he doesn't go out of style a single time. Hell, he even pulls off one of the best balance runs I've ever seen. That with the transition to one of the smoothest kongs I've seen. He then decends down the scaffolding in a quick set of movements to finish up. Truly a masterpiece in my eyes.

Next one is sorry about that by Dezrai. First time I saw this was during one of Larfen's cnc streams back in the day. The reason it is one of my favorites is because of the final kick. It's unlike anything I had ever seen before. Not to mention it is smooth as all hell.