Why won't my IPhone take video?

I've just bought a used IPhone 4 and it will not take videos… The photo tab works fine and saves pics ok but it will not switch over to "Video", when I press it… Does anyone have any suggestions?

No memory

Try restoring the phone through iTunes

Why did my iphone 6 plus suddenly stop allowing me to take videos only?

  • Why won't my iPhone record audio when I take a video? Every time I try to record a video with my iPhone it won't pick up the audio. All I here is this static noise. Sometimes I can barley hear my voice behind all the static. It just randomly started happening. When I record in voice memo it picks up my voice just fine. Phone calls work fine too. It just doesn't work when I try to take a video.
  • Why does my video have such bad video quality? I uploaded my video to the computer and it had great video quality, then I uploaded it to Facebook and YouTube and It looked horrible. It there anything I can do to change that? Save it a different way or something? I see all these YouTube videos that have been filmed by iPhone's and they have great quality. Shouldn't my 14mp camera have even better!
  • Why does it take so long to buffer a YouTube video on my iPhone? I have an iPhone 4 and my Wi-Fi is very slow for buffering videos of every kind as it takes like 10 mins to buffer a 2 min video and it doesn't do this at friends houses and T's only on ios devices here at my house tht have that trouble. Any way I can make my Wi-Fi faster?
  • Why Can't I Hear Anything When I Take A Video On My Iphone 4? I was taking a video on my phone but when I tried playing it all I heard was an annoying high pitched noise. However, my Voice recorder does work. Its just the video. It also works when I have my headphones in. I researched the problem and found out its common on the iphone 4/4s. I tried doing the microphone cleaning that seemed to work for others but didn't for me. Is there anyway to fix this? Or any apps that will allow me to record video and hear it?