Get a Davinci Resolve - How to Use HDRI Images as a 360 Background Video
This tutorial shows how to import an HDRI image in the Fusion page of Davinci Resolve. The HDRI image is then applied to a 3D sphere to create a 3D background that spans in every direction. The HDRI can then be used in a video as a realistic background for any project. Other 3D object can be added to the scene to create even more realism.
Go to Poly Haven to download free HDRI images to try it out. They have hundreds of free HDRI's for download.