PM only said that footage of someone—and not necessarily or impliedly reporters—exists,
He didn't even necessarily say that.
“We have surveillance video from the hotels that shows people turn on the shower, direct the nozzle at the wall and then leave the room for the whole day,
Note the tense. He didn't say "shows people turn ing on the shower". What he said more likely means that video taken by maintenance staff of an un-occupied room "shows" that someone turned on the shower and left it running, as opposed to video from a hidden camera showing the perpetrator caught in the act, live, on camera. (If any video even exists and wasn't just made up as a lie to save face by the official.)
I'm not saying the Russians wouldn't stoop so low as to install hidden cameras all over Sochi, but the official didn't say what Cory claimed he said.
Plenty of stuff the Russians do is real, like all of the unfurnished buildings, all of the corruption, all of the publicly stated plans to spy on communications, etc. No need to misrepresent anything.