EPISODE 5: The Rolling Shutter

The rolling shutter is an artifact you get from lower end throw away cameras that do not have a large CMOS chip.
This is due to the chip not scanning the image fast enough and part of the scan lag is carried over to the next frame. The effect It is very noticeable in fast action camera movement and tends to look like a jello effect on the image as it wobbles on the screen.
The only way to compensate for this is to limit fast action shots.
Better quality chips are starting to show up in cameras just under a $1000.00.
Most of these cameras are just shy of a thousand dollars. $700.00 on to around $2000.00. The equivalent of this ten years ago would cost you 30 grand.
These newer and better chips capture images clean and fast and tend to minimize rolling shutter problems, plus they have better light sensitivity and color depth. I'll place a link to my favorite low end camera, the
Canon EOS Rebel T3i which cost around $700.00 plus. The link below is very thorough showing comparisons and video samples.

http://www.imaging-resource.com/PRODS/T3I/T3IA.HTM

This camera will get you stunning HD video at 1080p with superb night time shooting with very little noise. There is a bit of manual handling to do such as using manual focus while filming since the auto focus tends to be a little slow to catch up and will be annoying.

This or any of the Canons EOS Rebel T3i's bigger bros are worth investing in.

There are other competitive cameras in the same price range and they all do a great job, but they all have features that you may or may not need for your type of production work. So you will need to research the features to find what works for you.