How do I access Cloud to view and reset or delete recordings?
In the ipad and iphone apps I can see only last 28 days. How do I reach the large number of recordings from earlier days in order to delete them?
That completely depends on the subscription plan you have. If you're seeing 28 days of videos, but not more, it sounds like you might have the Premier Plan, which only gives you access to the last 30 days' worth of recordings. The Elite Plan gives you access to the last 60 days of recordings.
You can always download recordings to your local computer, as long as they are still available in the video library.
I can see short video clips from my ARLO camara in the Library. But how do I access the hours of data that I supposedly have in the cloud? I have an iphone 5s.