Hmm, can you check what are your engine scalability settings?
I can almost notice in the new video that there is a noise that is typical for SSR (screen space reflections). Try this command console code - r.ssr.quality 4
If the result is better and you want it to be a lot more better check this link for instructions (its very simple) - 3D Modeling & Texturing: [Unreal Engine 4] Improving Screen Space Reflections