Films purchased or rented on Blu-Ray, DVD or Digital are available to you for 'home use only'. In Australian and New Zealand copyright law, screening a film or movie clips in a non-domestic public setting (including Churches and Religious institutions) requires permission from the copyright owner.
A general rule of thumb is if the screening is outside your home, it's considered a public screening and will require the appropriate license. The Big Studio Movie Licence provides you with the legal coverage to screen movies at your facility address.
Find out about your responsibilities around movie copyright by reading THIS
Australian Copyright Council article.