Is there any format for videos like RAW format for photos? Like the RAW format for photos which stores the exact image information that is of great use for post processing, are there any similar formats for video?
Yes there is but if you have to ask, you probably can't afford it :)

Digital video cameras for professional use can shoot in a RAW format with one file for each frame. The bandwidth required is enormous and requires fast hard drives or an output over a fiber-optic link. Pricing is several times that of a full-frame