Casting (almost) any movie or show
I downloaded Avia to see what it could do.
To my surprise it let me play any movie I had on my device.
I started wondering if I could use it as a app to open any video from any app.
I opened Showbox and selected a show. I pressed "use third party player" and selected Avia. The chromecast button still was highlighted and the show came right to my TV after a couple of seconds.
Just a cool discovery if no one found it out yet.