The application is cool, but there is little novelty here. All of the employed techniques are well-established.
I suggest removing "novel" from the title unless you wish to seriously disappoint some people.
But that’s exactly where we’re at. Disappointment is fine, attention is all you need.
I tried to apply existing mp4 H265 like compression to 3D splats. Do you have any links to other 4D splat formats?