Apologies for the delay in responding – I’ve not disappeared off to Mexico to hide from YouTube playlist issues as you might have thought, but been on holiday.
Okay, this issue is coming from the length of the playlist ID. It used to be that YouTube defined a fix length for them. Which is good because it made differentiating between playlist and normal video IDs rather easy. Now that appears to have gone out the window. So, for now, the answer isn’t quick. Sorry. I’m going to need to go back to the drawing board on how I do this, whilst keeping backwards compatibility.
I’ll start on this straight away but no ETA as to when I can deliver.
David.