Install Continuous Concrete Landscape Borders

What happens here

With the site prepared, the concrete landscape borders are installed. The video shows numerous finished sections and workers using what appears to be a specialized concrete curbing machine (red machine on wheels at 0:27). This machine extrudes continuous concrete curbs directly into the prepared trench. A cement mixer is used to prepare the concrete mixture, which is then fed into the curbing machine. The machine forms the concrete into a desired profile (e.g., sloped, flat-top, decorative) as it moves along the marked path. Once extruded, the fresh concrete is often hand-troweled and smoothed for a professional finish. Multiple sections are shown completed or in various stages of curing.

Goal: Create durable and aesthetically pleasing continuous concrete borders around garden beds and trees.