I took the plunge and got the pro version just a few minutes ago. It seemed after some issues yesterday, where I found the solution earlier for needing a Google API key:
I then noticed a limitation of 3 videos per playlist - ooops. Okay, so I next thought I should get the pro version and it is very nice
It is nice the API key was automatically copied across in the feed settings too
My wordpress blog is here :
I like the big community there seems to be for this plugin - and it seems a good choice for my chess channel which I have over 5000 chess videos on!