Recorded videos on Raspberry Pi 4 will not play after being recorded

Hi. Newbie here to LibreElec.

Installed on a Pi 4 and have TV channels displayed via TVheadend. I am able to watch channels o.k. and record but when trying to watch recorded content all I see is a spinning circle and despite waiting a few minutes the video does not load. I can see the video is trying to play as the recorded clip time is playing but nothing shows and only a spinning circle. I am recording to the Pi's SD card which is a 128GB SanDisk Extreme Class 10.

Any idea??

Cheers

Sorry Solved! it was related to increasing the amount of GPU memory within the config file to 'gpu_mem=128'