Why your nodes look different from my videos
ComfyUI has two looks for nodes. One switch changes it, and the Pixaroma nodes work in both.
Two looks, same nodes
My videos use the classic look. ComfyUI also has a newer look called Nodes 2.0. The nodes and their settings are the same in both.
Switch it
Open the ComfyUI menu (the logo at the top left) and turn Nodes 2.0 on or off. Or open Settings, search Nodes 2.0 and change Modern Node Design (Nodes 2.0).