Guy at work quite into his football (he's italian), pays for BeIn sports.

I believe he's got a Sony Android TV and a samsung tablet.  Currently I think he's casting from the samsung tablet (browser) to the chromecast aspect of the tv.  It's jerky (I'm guess it's being converted to a video by the tablet, rather than handing off the stream to the tv).

I don't think there's an app for Sony TV (I don't have any of this hardware to confirm it), but if someone has some details on how to get a better experience, I'd love to know.