Here you go :)

https://floooh.github.io/sokol-html5/plmpeg-sapp.html

I'm guessing there won't be much difference since jsmpeg already has a small chunk of C code that gets run through emscripten and both libraries are written by the same guy.

https://github.com/phoboslab/jsmpeg/blob/master/build.sh

jsmpeg is by the same author!