chromecasting not integrated with your video player

Hello, I've come to love that I can use chromecast to stream various videos/streams from youtube/netflix/twitch, etc... however, I find I can't use it that well on your site.

You see, your video player does not seem to have this feature/ability as a native solution. Instead, I have to rely on my Chrome browser's plugin "Google Cast" to show the tab on my TV, which is a very inefficient method.

What reasons are there that you guys wouldn't use Youtube to share your videos? You could take advantage of so many things with that platform.