Credits are units used for video creation inside Veeroll: one video created is one credit. You can use a video created for an unlimited number of campaigns.
The credits are valid for one month and regenerated every month depending on the plan signup date. You don't need to buy extra credits unless you need more videos than your monthly allocation.
Depending on your plan, you have a monthly allocation which expires every month. You can use your monthly credits within 30 days. Credits will be carried over for a period of 6 months..