How does one decide which "films" need to be certified by the CBFC? Would a long special episode created only for television, with no theratrical release, require certification because it is called a "movie"?. Is a film defined in terms of its length or the format in which it has been released?
If you mean documentaries, when you say Long TV serials and programs (that is what I can think of, by long programs), then officially, they need to be sent to CBFC for review. I am not sure, whether CBFC actually awards a certification for the same. Reason being, if a certification is given, then it has to be displayed before start of the film/feature/ad/documentary.
As per the details present in the FAQ section on CBFC site, for normal TV serials/programs:
However, TV exhibition of a feature film, comes under purview of CBFC certification, and a film must be certified, before it is shown on TV