I've been using plex to cast from my iphone or ipad and it works great. Here are the steps.
How to Cast Plex from Apple Ipad to TV using Chromecast
Step 1. Download and install the Plex Media Server. Free Programhttps://plex.tv/downloads
Step 2. Sign in and add your channels.
Step 3. Sign up for Plex Pass Subscription.
3 Different Price Plans. The chromecast feature will eventually be free.https://plex.tv/subscription/about
Step 4. Download Plex from the Itunes Apple Store. Cost $1.99https://itunes.apple.com/us/app/plex/id383457673?mt=8
Step 5. Demonstration
Make sure Plex Media Server is running on computer
Start Plex App on Ipad
Choose your channel and then your video on Ipad - Click the Cast Button and it automatically finds the Video Player and plays the video. You hit the cast button and it casts from phone to the Television.http://youtu.be/P4k-ZtfFBYQ