The group Web3D had some Music Video Competitions on 2017 and before…
Blender and most of other softwares has not compatbility with H-Anim, because of this it is very complicated yet. I hope Blender will have a H-Anim exporter soon. I think it is very useful because of its legibility… Other formats of animation are very confuse. I think an human readable format on Blender, it is very useful to future compatibility on a changing world. With human readiblity any future developer could traduce a lot of Blender information in theory without very complex process and patent problems.