How much video can an iPhone 5s hold?

I have a 32 GB iPhone 5s and I was wondering how much video it can hold, if everything else that can be deleted has been deleted?
Also, how long can a fully charged iPhone last if all it's doing is recording video?

My iPhone charges when I connect it to my PC but does not appear to be there

My iPhone charges when I connect it to my PC but does not appear to be there, Help?!

Added (1). Edit

my iphone charges normally, but then when I open "my computer" to open my iPhone and see it's contents, there's no icon for it, it's like its not even there!
at the same time iTunes keeps saying it couldnt connect to iPhone cause the device has timed out
what can I do to fix this?

Download speed slow on only one computer?

So lately, my download speed has been extremely slow on only my desktop computer, on my laptop, i get around 25-30 Mbps down, but on my desktop i only get around 3 down. I tested on my iphone and ipad aswell, and they both get around 30 Mbps down aswell.

What's cheaper boost or cricket?

I'm planning to get an iPhone 5c… But I wanna get a company that is cheaper cause I'm also trying to save money to go to Florida in March so…

What's better, IPhone 4s VS Nokia Lumia 930?

I have an Iphone 4S that I got maybe 2 years ago. It works fine, its a little slow, but I still enjoy it. I have a few apps like some Photo Editing apps, but mainly I use Instagram, Funny Pics, C&H, and Netflix. Are all these apps avaliable on the Windows phone? I also want a windows phone because I can easily hook up to my XB1 and PC, the better battery and camera, and also because I'm sick of the over simplicifation of IOS. Sorry if this is to long, and I will give the best answer to the person with the most points as to why I should stick with my Iphone or get a Nokia Lumia 930. Thanks,

-Bobbylicous

Added (1). turns out its only for UK, but same basic question, the best windows phone vs iphone 4s.

How to convert a song off of YouTube onto my iTunes by just using my iphone?

I have an iPhone 5 - don't know if this makes any difference! And I'm trying to get a song onto my iTunes from YouTube but all the videos I've seen giving instructions are to do it on a apple computer and then into iTunes file! Is there any way that I can just do it on my phone onto iTunes on my phone?