"Fair use" is a fine line... The only cases in which you would be able to use "clips" are in the following cases:
- Non-profit, educational purposes
- Parodys
- Comment, Critique and Criticism
I think even then, it's safer not to use them in your "advertisements", expescially if it's going to be shown to the general public.
Edit: Just realised you're from Australia, and your fair use laws differ signifigantly. It would be best for you NOT to include clips into advertisement.
Edit: Found this
Quote -
What is ‘fair use’ in Australia?
The concept of fair use is applicable in the Australian Copyright Act and is technically known as fair dealing. These are exceptions to infringement which allow some uses of copyright material without permission or payment. These exceptions include:
Fair dealing for the purpose of research or study, which allows a student or researcher to copy protected material. Copying 10% or one chapter of a published literary, dramatic or musical work, or one article from a periodical, is deemed to be fair.
Fair dealing for the purpose of criticism or review. This exception allows reviewers to make fair use of copyright material provided they acknowledge the work.
Statutory licences which allow educational institutions, institutions assisting people with disabilities, and Federal, State and Territory governments to copy protected material for defined purposes, without the need to obtain the copyright owner’s permission.
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http://www.johnwiley.com.au/highered/gen-n...-info.html#fair