A Few Questions about the Video Portfolio

I understand that this video portfolio mostly talking about myself and what I enjoy and even what drives me. I’m thinking about making this a vlog styled video with lots of cutaways and edits, and the questions I have are this:

  1. How much of showing myself in the video is too little? I might end up doing more cutaways than footage that directly shows my face/body, so I'm concerned that I may not have a great amount of screen time other than in cutaways.
  2. Given that I talk about myself, make it 2 minutes long, and make it appropriate, can I do anything I want with this video, including video effects and such?
  3. Given that the video portfolio option is very new, where can I find good examples of other people doing video portfolios for other colleges?