IELTS can be a serious business and this video is obviously very silly. I expect you can spot the mistakes, the real question is how do you avoid making them? A good place would be to ignore anyone who trains you to learn answers to questions. Just relax and listen to the question you do get asked.
I have posted a response to this video here. If you watch, you will see me show how to put some of these mistakes right.

Wow..!
It’s a really nice video about IELTS Speaking- a common mistake. From my point of view i want to say that don’t ignore this video first see it and try to rectify your mistake.