I am like Sir Alex, I have been using Tasker for 2 years now, but I was playing with the lite version, and I really don't have time as I work weekends a lot too, to try and configure this. Also, I noticed he just updated the description of his app in the Play Store. He now says not only do you need Tasker, but the video he used as a demo also contains other apps you need to purchase.
I'll wait to see what else comes around for Chromecast.