To rent a video, sign up/log in and browse for videos. Click 'Rent Now' on a movie of your choosing and proceed to pay on a secured payment platform. You can pay with your card, or directly from your bank account. To avoid repeating this process, you can 'fund your wallet' on the platform, and pay from it whenever you want to rent a movie. That's all!
If you wish, you can choose to fund your wallet, to avoid repeating the steps above on every rental.