The first half of the video is mostly Thapki and her parts. She's not going to fast for Kurva Chauth. Second half Dhruv is mum, family wants to know what happened and in walks Bihaan (bandage around head - as that is the main point of injury for any accident in a serial) and Thapki at his side. Appears that Dhruv thinks Bihaan is gone and Thapki may have found him.
I can't watch the whole thing myself right now but that's the gist of it. There is a short interview with Ankit and Manish near the end where they explain. Bihaan does try to fake his death though to bring Dhruv and Thapki together and Pan is in on it but Thapki finds them out and spoils his plan. Looks like Dhruv and Bihaan have pretty much made up.
http://youtu.be/4PDlO7ApDaU