It looks like an issue with the roughness cutoff threshold, or more generally a settings config. issue with the RT reflections. Glossy/rough reflections are generally more expensive than sharp ones, and there’s also the possibility the video used a different build or even a different reflections method such as SSR, I’m simply not sure though.
Perhaps it’s even the UE5 version of the project, and lumen reflections will give entirely different results than RT.