EscortGuru

I personally use keepvid.com for saving youtube videos and if you want only the audio then you could go for snipmp3.com, hope that helps :)

I wouldn't suggest you to buy iPhone 5S or 5C you can buy more feature rich phone with same or less amount. iPhone 5S has only one unique feature that is fingerprint detection other than that it is redesigned Android. I would rather buy Samsung or HTC :) Only buy iPhone if you are apple fan boy :)