Hello,
I've checked your sample and the problem seems to be visible there also. To reproduce:
1) Start your sample on iOS simulator
2) Tap Open -> The fist video starts playing
3) Swipe Rotator to the next video -> 2nd video starts playing (you can hear both of them)
4) Tap Back -> Page is closed but you can hear that both videos are still playing in background, to stop it you have to stop the app
The first smaller problem is how to stop / pause video when content is not visible? I could manage it with some ugly code, mostly working :) but would appreciate any clean solution :)
The second bigger problem how to dispose all video players /pages when page is closed?
Best regards,
Radek