Hello there and welcome to the Wowza support forum.
Please see this guide for setting up Video on demand streaming:
How to set up video on demand streaming
Be sure to follow this step:
And this guide on using JW Player:
To play your own content, copy it to the [install-dir]/content folder and substitute its file name in place of sample.mp4 in the sample URLs in this section.
How to use JW Player with Wowza Streaming Engine
There is an example for streaming to iOS devices.
A sample URL for iOS would be:
Please let us know if you need help after double checking you have this all configure correctly.