Is iPhone 4S good for filming on YouTube?

I'm gonna put prank videos on YouTube. And I don't have the best video camera in the world. But I have a iPhone. Is it a good camera to use? Is the video quality good?

And also. Is the sound quality.

It is very good but make sure to record sideways, vertically is horrible!

1080p and decent colours, its a good cam, will be fine for youtube, just keep it still and film in landscape

Decent. Not great compared to an iphone 5 or the ipod touch 5th generation. They both have 1080p recording (crystal clear HD)

Watch this movie, i think that will help you.

pro video tutorials

Yes it is good for filming for Youtube. Its has good picture quality and features. You can uplaod in better quuality. But capture image of videos by sideways. When you upload your videos with capturing by vertically its looks very odd and may it all not be interesting.