Samsung UN75ES9000F E-Manual page 513

using your remote when the
alarm window appears, the media
contents are not played.
N
The first time a device accesses your
TV through the media function, a
warning pop up window appears.
Select Allow. This permits the phone
to access the TV freely and use the
Media
N
To turn off media contents
transmissions from a mobile phone,
function to play content.