Hello,
First of all, thank you for your purchase.
If you are using the plugin to import videos from YouTube, you can use a comma separated list of YouTube API keys in the ‘YouTube API Key List’ settings field.
Also, if you are using the plugin to automatically publish videos to YouTube, you can request YouTube to increase your daily quota for your API keys, here: https://support.google.com/youtube/contact/yt_api_form (please make a ‘Quota Extension Request’)
I hope this info helps.
Regards, Szabi – CodeRevolution.