YouTube app runs when I handle a YouTube movie in a card (iOS)

Question:

YouTube app is kicked when I handle a YouTube movie in a card.
How can I stop the app.

Answer:

1. Prepare one line " https://youttube.com " in some notepad.
2. Select the line and drag it an inch (to have the url embedded in the line).
3. Hold your finger on the line and release it, then you will be prompted a list of actions.
4. Select "Open in Safari"