Can't send videos to my iphone 6 plus?

Ok so i bought an iphone 6 plus about 7 months ago and i was using it like normally by sending videos from my pc to my iphone and everything was fine until i updated my itunes!
after that i wasn't able to send videos or audios from my pc to my iphone utill today when a friend told me to format my iphone which i did and i was able to send audio files but not videos!
everytime i drag a video to itunes this message appears! Cant send videos to my iphone 6 plus

Looking for car radios with the following features for my 07 Chevy Monte Carlo?

Looking for car radios with the following features for my 07 Chevy Monte Carlo? - 1

Added (1). XM Radio - (& HD Radio if possible) - NAV-GPS - DVD player = USB-able to play audio & video from thumb drive - Back-Up Camera - Bluetooth-able to connect to my Photon 4g, or iPhone but able to keep connection to OnStar - TV Tuner (if possible) - Video outputs for head rest monitors or roof mount flip down monitor - AM/FM Radio - CD/MP3 Player (possibly changer) - AUX Input - Wi-Fi Access (if possible for online stations like 89xradio.com) - Mixer-Equalizer - pref. Brands Sony/Pioneer/Kenwood

Should I upgrade to the iPhone 6? - 1

I'm gonna get right down to it: I have an iPhone 5 and I like it but I'm going to florida in 2 weeks and I want to take some stellar pictures and have a better battery performance. Should I upgrade to the 6 (I have an upgrade) or should I just stick with my 5 until the 6S comes out? I really want a new phone but I don't know if it's worth it or not… Thanks in advance!

My iPhone serial number is not valid?

My iPhone serial number is not valid?

Added (1). I just bought a sealed iPhone from Amazon and when I typed the imei online to see if it is unlocked, it said that the serial number is invalid. When I typed it on Apple's website, it said Please activate your iPhone:

"We're unable to display coverage details because your iPhone has not been activated.
Please contact your iPhone retailer or wireless carrier to activate your iPhone"

Is this because the phone is new and sealed and it needs to be activated when I turn it on for the first time?