Video uses plenty of space. still photos not so much unless you are a pro or semipro and shoot in RAW.
My digital camera is an 8 megapixel one, and it holds 288 images on a 1 GB card at the highest quality setting.
I use 1 and 2 GB cards with it. Even a 4 GB card would be overkill. I guess some people might get a 32 GB card for a camera like this, just so when they turn it on it shows space for around 9,000 photos 
