Experiments with decoding of H.264 in JS+WebGL were done in the Broadway project, and while (as mentioned in the article) reasonable frame rates in JS alone wer

Experiments with decoding of H.264 in JS+WebGL were done in the Broadway project, and while (as mentioned in the article) reasonable frame rates in JS alone were achieved, WebGL was not a huge benefit. The problem is that H.264 was not designed to run in a massively parallel manner like GPUs expect. There is too much stuff that is serial, so you must run that on the CPU. But a new codec like ORBX.js however can be designed to run efficiently in WebGL, that is what is interesting here.