It's not letting me put youtube videos onto my iPhone 4?

I've download YouTube videos onto my mom's computer and the type is.mp4 but it won't let me put the videos into the Movies or TV Shows folder on iTunes. I did what I was supposed to do in order to put videos onto my cell, but it's not letting me do it. I have enough space on my iPhone, too. Is there a reason why it's not letting me put videos on my cell?
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How to get out trouble in school?

I stole an iPhone 5 and sold it for 100$ and I got caught and sent to counciling office what do I do please help as soon as possible

Is a mirror or a photo more accurate?

So, I'm a little insecure about how I look. Okay, I'm Really insecure about how I look. I look fine when I walk out of the door, but I take pictures of myself and see pictures of myself and I look horrible. My nose looks 5 times bigger than it does in the mirror. Also, when I record videos using my iphone, I look just like I see myself in the mirror. I want to know which one is more accurate, because I'm in high school and this stuff can be really stressful.

Do we really need a PC in the future?

I had my iPhone 4 since 2 years and switch to the iPhone 5. I used my phone more than a PC. Since I had my Nexus 7 since January, I sold my PC to my brother and… I realize that I didn't really needed one because my phone and my tablet does my web needs.

What do you guys think? Do we really need computers in the future to do simple web base stuff?

How to re track down my stolen IPhone?

I recently just bought the Iphone 5. Today someone stole it out of by backpack at school (its caught on video tape). Though when they searched the guy they just found about $100 on him which is the money that he got form selling it. The problem is that I didn't put the find my Iphone app on it and att isn't helping.

Why can't i get my iphone 4 out of recovery mode?

I bought an iphone 4 from my friend today and when i plug into itunes it says its in recovery mode, and the iphone will not turn on at all no matter what i do without a computer. When i plug it in, the apple logo comes up for half a second and the the itunes plugin thing comes up. I'm on the latest version of itunes, and when its preparing for the restore, my computer keeps making the beeping noises when it connects and disconnects over and over, and it says the iphone "iphone" could not be restored. An error has occurred. So what should i do? Is there any way to get out of recovery mode without a computer? I really need help because i need the phone for music until i get it activated, so please any help would be appreciated.