Canon 5dmk3 video
You can use HDMI clean output but I don't know if you can have it on the laptop. Our video team uses my 5d sometime but with the Ninja Atomos as an external recorder.
You might want to shoot the movie in sequences also. Shooting such a long video will give you a huge file that your computer might not open You shoot short 5-10 min sequences and then you make the final AVI.