Play youtube video IOS problem

hey there!
I’m trying to put a youtube video in my frame, with “iframe”, but i’m dealing with a problem: when i run the app in ios if i click in the link of the video or the youtube watermark, the youtube page with the video is opened inside my app and doen’t let me go back. I have to kill the app to view it again.
I’ve tried to delete all youtube sponsors, playing with de youtube API, but i think that it’s impossible.

Do you have any idea about what i have to do?