I need to use my iPAD to record my laptop screen. I notice that it uses about 25 MB for every 15 seconds of recording time. Can I set this to a lower rate? If not, does anyone know of a free video recording app that is similiar to the default one on an ipad that I could set the recording rate to be lower? I need to record about 2 hours of video and I don't think my 16 GB ipad will have enough space.