Can I place a visualizer video as a background for another visualizer?

I want to use a visualizer I already made as the background of my new visualizer project.

Yes! You can upload an already rendered visualizer inside another visualizer in order to produce videos that go beyond what a single template offers. For best results, use the same song as the basis for both visualizers.

For a more detailed answer, check out how to Make one epic video with multiple visualizers.