Casting an Argyle TV stream.

I use chromecast to watch Argyle away sometimes, buy the stream, click on the 3 dots top right hand corner of screen, press cast then the Lounge tv button and watch on the big telly. I actually do the same with the audio. Just read a thread on another vile site and someone was asking why they can't stream Argyle TV and someone said it's a legal issue to stop you casting to a big screen in a pub? Shorely that is not correct if you have paid for said stream?

I use the Apple lightening digital AV adaptor, connects my iPad to smart tv no issues.