To buy movies on Windows 11/10, you need to use the Movies & TV and Microsoft Store apps. You need to open the Movies & TV app > click on a movie you want to buy or rent > select the pricing as per the video quality > and complete the purchase. It is the whole process you need to repeat to buy or rent multiple movies. When you stream a rented video to your Xbox console, you can only view it once, within 24 hours from the time of rental. Unlike a video that you buy, a video that you rent must be viewed on the device it was rented for Xbox console, computer, tablet, etc.