iOS Question Cast to chromecast on iOS

Hi, is there anyway I can cast a video to chromecast or smarttv in iOS?
I know it can be done, because facebook, youtube and some apps I use it can do it
By this time I can cast in Android using DonManfred's Casty library, but although I did a lot of research in the forum, I didn't find how to cast from iOS
Can anyone help me please?

Many thanks