A Low Blow for Fictionalism

I am have been a proponent of fictionalism for a short while now, but MinutePhysics has come out with this short clip on how the universe boils down to the mathematical. I wonder if the speaker in this video has ever considered fictionalism, so it would be interesting to hear how he addresses that branch of thought directly. I don't yet have any good arguments as to why this video is wrong or misleading, but maybe I'll come up with something soon. Enjoy!

For an introduction to fictionalism and other schools of thought about math check out my post Do Numbers Exist?