Just to understand, you want something, say if it were a small ringin the middle of the texture, to be such that over time that ring expands outwards towards the edge of the mesh; akin to ‘zooming’ into the texture?
Does this loop over time? Is the intent to get something pixelated at the end, or what?
If you want to zoom-in, you can try scale-uvs-by-center, otherwise if you want something unpixelated, you want a flipbook, a volume texture to animate through, or something with multiple slices of data you can trip through over time.