Hey there this is not an issue on our plugin side. This is an issue on all Youtube videos https://www.youtube.com/embed/U-xetxYwyak for example this video gives an error too.
In this case you don’t need any update. Simply use it and wait Youtube fixes on their side.
You can take a look this discussion: http://stackoverflow.com/questions/40622204/uncaught-referenceerror-ytcfg-is-not-defined
By the way thanks for your purchases and contacting us!