The total recording time of the video changes constantly.
The found footage playing won't show the REC sign or the total recording time.
When Jithu disappears, the battery of the handy-cam is very low, but in the next sequence it is fully charged.
There were no candles in the 1800s.
The character of Vishnu is not possible because as he clearly states that he is the great great grandson of the lead character, a later sequence shows that character to be killed by the witch.
When the heirloom housekeeper shares the story with the four teenagers, there is no interpretation of who is speaking what and when.