I've never found any TV mix in the internet on an AutoTune procedure.

So for Freeview Play your set would need an app and not AutoTune.

For others this is what FreeView Play is:
"Freeview Play is the new offering from Freeview, offering both both catch-up and on-demand television that will be streamed across the internet connection from your television or set top box as well as the traditional TV Electronic Programme Guide (or EPG).Feb 12, 2015"
More at https://www.freeview.co.uk/why-freeview/freeview-play

It's possible at some point sets will merge these two.