I saw the purchase options online for videoscribe. They are mostly based on paying for a year with different paying options. I wonder do you have options to use and pay for only one month.
Link to the pricing page: http://www.videoscribe.co/buy?gclid=CK3UjamktMwCFZI9gQodruAIFQ
with yearly, monthly and lifetime memberships.
Buy the monthly one and cancel it immediately if you don't want to be billed automatically next month.
-Mike (videoscribe user)