How come iphone doesn't have playlist like for music? It's messy?

And how do I know what is taking up my phone's space?
I got few gigs but I don't have much file.

Added (1). i was asking for movies though. Strange I thouight i did type like music for movies.

Videos don't have playlist.

Added (2). I don't see no usage on settings.

Added (3). using phone 6 ver

How to fix not being able install anything from app store?

When i attempt to install free apps from the app store it says that verification is required, its not the credit card because others in my family can install apps and purchase things. Also "none" is not an option in the payment methods either, i have tried creating a new accohnt and selecting none but it doesn't show there either. How do i fix this?
- I own an iphone 6s
-this randomly started a few days ago, i have been buying and intalling stuff for months until this issue.

IPhone issues. Will the Apple Store replace my iPhone?

I got an iPhone 6 Space Gray 16gb in June 2015. Around September I noticed my front facing camera was literally falling into my phone. I went to the Apple Store and they looked at it and said they would take it and get it fixed in 2 weeks. I got the phone back brand new screen everything was good. About 2 months ago I got a call from someone and I couldn't hear them unless I was on speakerphone. This happens quite frequently. I noticed about 1 months ago my camera was falling again! But not as bad as last time. I'm wondering if I should bring it back to the Apple Store and see if they could fix it or hopefully just replace the whole thing. What should i do? Its a 50 minute drive and I don't want to go there for nothing. Do you think they would do something about it? Or not because I have already been there. And if you read this far i'm surprised, thank you! Lol

Tengo un iPhone 4S Fisicamente valido PERO No es iPhone 4s AYUDA?

Tengo un iPhone 4S Fisicamente valido (Tiene las 4 rayitas a los laterales, y tiene la tarjeta logica de un iphone 4s) PERO, No tiene siri, el software es 7.1.2, no puedo actualizar a mas, y trato manualmente con un firmware de iphone 4s e iTunes dice ue es incompatible AYUDA

Can i turn mac off and keep video going?

I was wondering if there was a way to close my laptop with a youtube video going but the sound/video still plays? Like so if i want to listen to music and close my laptop? Could i do this with my iPhone too somehow?

My iPhone 6's screen went black but still works. What can I do?

Earlier today, I opened my phone to check on my snapchat and once I opened the app the screen went dark. I assumed that my phone died, I didn't really see how much battery life it had left. I charged it for a few minutes mainly because I heard the sound it usually makes who you connect it. Then it started overheating. The phone still works, I'm hearing reminders, notifications, text messages etc. I've tried rebooting it. Even the hard restart and nothing. What else can I do? The last thing I want to do is go to the Apple store mainly because the phone is a lease.