Well, she's really busy.
From a non-youth, I would point a couple of things. Yes, there are youths whose mantras resemble what Dayem and Amina talk about. But there are, of course, others who do not. I assume you want to count them also because even if these religious Muslims might not count them as Muslim Youths, they probably fit in your idea of your categorization.
They don't wear scarves or beards or go to the Mosque unless their parents encourage or make them. Even if they do go and wear scarves, they don't wear them to school or the mall. They look hip and cool and listen to rap and popular music from the culture they belong to. They blend in when they want to, and they group together if they can when they find others like themselves. They usually date, even if it's only at school.
Whether they realize it or not, they identify strongly with the politics of Islaam, especially those coming out of and related to their particular culture. Because even if a Muslim youth can blend into a group of kids at the mall, when the news comes on of a slaughter in Baghdad, an earthquake in Pakistan or a riot in France or Algeria, they feel it so strongly that the need to blend can melt away with their hot emotions and ideas on the current event. Their cool friends hear about their backgrounds and families when these things happen. They make decisions whether or not to hear about these events from the Muslim Youths' points of view or to slink away or to vocalize that that's uncool.
And this group of Muslim youths may have friends whom they like or enemies whom they battle with who are religious. So the people around them hear about this too. They may join with the religious group and sit with them at the mosque, or they may actively group together and apart from them forming two distinct groups. They may not have much choice and just blend at the mosque with others from their original culture, or there may be enough of them to have a group of 2nd generation Muslim youth not based on religiousity, but on the fact that they speak English fluently, and their original language and culture seem a bit more distant to them than their peers who are 1st generation.
Al-Hamdulillah (From a Married Muslimah) La Howla Wa La Quwata Illa BiLLah - There is no Effort or Power except with Allah's Will.