Chromecast Trick for Windows 8. Fullscreen tab casting while doing other things!
Okay, I use my Chromecast to watch NFL Sunday Ticket on my TV. Sometimes I want the game I'm watching to be full screen, however I want to be able to do other things with my laptop while watching the game. Two solutions. If you use Alt+Tab to switch to another program, your tab stays full screen in the background. If the program you want isn't already open, or you want to browse the web without minimizing your video, go to the Start Screen (via the keyboard, charms bar, or bottom left corner) and you can launch any program or open another instance of Chrome and your video will sitll happily play full screen in the background.
This is great for any video you want to watch full screen that doesn't have native Chromecast support but still want to do other things on your computer. I have used it for HBO GO, NFL Sunday Ticket, as well as a few other video sites.