Grainy ,

If you want to shoot video with Canon , use LOMO Anamorphic Square Front Cinema lenses.They start from 700 dollars and climb to 25000. Directors are begging for these lenses and they go very parallel with Canon Sensor , Software color gamut. They show flesh unbeliviably like 70s Elite Pornography.
There are many test shots with these lenses on canon at vimeo.
There is a camera as Z series Sony with Zeiss lenses and find Irina Shatalova at Vimeo and watch her North Sea Lighthouse Keeper video. I am very optimistic about digital when I saw this video. May be 10 years later , cameras and Zeiss lenses will go with same quality less than 2500 dollars new.