Those channels are not feeds, they are mainstream regular broadasts. A feed is a signal not usually intended for general public consumption, usually sporadic and transient (typically a feed is used to transmit unedited news source from a remote location to a broadcaster's main base, or else for those "live, on location" segments in the news).
"C-band" is the band of frequencies between 3700 & 4200 MHz.
All the channels you mention are in that range - so yes, they are c-band.
By the way, the same channels ARE in Ku-band too, but those signals are carried on the South African spot beam (not receivable in Europe however big your dish...)
2old