My pleasure :)
I honestly couldn't say if my methods were different to other games without digging around in their code, but an advantage to encoding my video files in .webm is that the resulting file is so lightweight that it can run on pretty much anything without lag (provided the user has the necessary drivers updated).
I try to make sure that anyone, no matter their internet, device or rig, can play CK without issues. I don't always succeed, but I try ;)