Downloading YouTube videos on my iPhone 4S?

How could I download YouTube videos on my iPhone? Don't care if I could see them just want to hear them as if it where songs you know. There's a lot of motivational work out videos I want.

I use foxtube it costs $0, 90 but you can download youtube videos with high quality, and save them to your camera roll easily.

  • YouTube on my iPhone and IPod won't let me watch certain videos? At random times I try to watch a video like a lyrics video. Today I was gonna watch chasing the sun by the wanted and YouTube said "you do not have permission to access the required resource" I have no restrictions keeping me from watching anything and it just recently started doing that.
  • Why won't YouTube let me publish videos from my iPhone? Everytime I try and upload a video from my iPhone. It does the "Preparing Video" and about halfway through a message appears saying the video couldn't be published. I just tried uploading a video that shows how to get the "Super Perks" and "Beauty of Annihilation" Easter egg on Call of Duty: Black Ops zombies mode. The video is 19:06 minutes long. I know it will post because I've seen 40 minute long videos.
  • What apps in playstore are good for downloading videos? I have an iphone and I have this app called titan player and you can download videos straight off the internet and then it goes into your files on the app and you can watch them with no internet connection. But thats in the app store and I want an app just like that but for my android tablet.
  • IPhone 4- I can't watch videos on youtube or any other videos? On youtube it keeps on saying playback error or either that it loads way too long that I give up. I've cleared the cache. I'm not sure whether I have good connection or not but I guess that I do have good connection. Is there any way to fix this?