Ridiculous that Google trying to dictate front end tech

Why should Google believe they have the right to demand that any platform must use a given front end technology for an app? It is completely understandable that a developer should follow conditions and terms for how services should be used and must support things for advertisements, etc. But to demand that the front end technology used is say HTML5 like in the case of the current YouTube dispute is really obnoxious and wrong.

is this so that Google can stop another platform from racing ahead with platform specific innovations when it comes to front end technology?