For the most part, clicking on a youtube video in mobile Safari or Chrome will bring up the YouTube app on your iPhone, iPod touch, or iPad. There are a few reasons why you might not want that to happen, one being that the YouTube app isn’t quite as full featured as the current mobile YouTube site itself, another being the waste of time of switching back and forth between the YouTube app and whatever mobile app you found the link in.
Forcing your iPhone to stay in the app you clicked the YouTube link in is as easy as it is non-intuitive. Here’s how to make it happen.