cellphone idea

The idea of Radhika to record on cell phone as a last ditch effort to prove Barkha's true intentions didn't quite succeed, atleast it appears for now. However, I noticed they borrowed the same idea in another show which I watched last night (Maha episode) and this time around cellphone (i am assuming as it was not shown clearly what took the video) takes a video and was shown successfully to everyone and the bad person got caught finally.