rte player and Lightning adapter to HDMI

i have bought the genuine Lighting to HDMI adapter as I wanted to play film from the RTÉ player on my phone on my big TV. It won’t work. I can get audio and the length of the film but no pictures. It does show the opening pages of the Player.

is this a licensing issue as I am in Northern Ireland and Apple is blocking as I am in the UK? Netflix works fine.