If you’re looking for the ITVX Help area, it’s over here.
Downloads are available by subscribing to ITV Hub+ which is £3.99 a month. As part of your subscription, you will be able to watch ad-free on desktop, iOS and Connected TV, as well as download shows ad-free on your iOS device (iOS 14 and above). If you're having trouble with your downloads, follow this link for some advice.