I have done some research on Youtube and found following 2 very interesting videos regarding MBA application essay writing.

If you are still struggling with MBA application essay topics, watch this video and spark your head:

This video talks how to get into Stanford Graduate School of Business. It has a lot of information on application essay writings. I favorite this one as this video talks WHY and WHAT you should write on your essays rather than general HOW-to. Take some time to watch this.