This tutorial is for everyone who has been waiting for a solution to stream web videos to a Chromecast by using an iPhone or iPad. It is easy as a cakewalk.
Get Video and TV Cast Browser for Chromecast from the iOS App Store.
Enter the URL to your video in the browser's address bar.
Wait some seconds until the video link is recognized and shown at the bottom below the browser. If nothing happens, try to play the video locally first and wait a few seconds. Flash video is not supported.
Selecting "Tap Here To Cast" will send the video to your Chromecast. Enjoy the show!